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Google Ngrams: The highs and the lows

The other day I was reading James Taylor's blog post about using interesting charts and graphs in classes and it reminded me about Google Ngrams. It has taken place of the article I intended to post about Apps, but Part Two of Digital Teaching Toolkits will appear in a future post.

Google Books Ngram Viewer can be used to produce interesting charts for class, check word frequency, look at parts of speech, and collocations.

I enjoy using the Ngram viewer and I think it is a useful tool for teachers and students. It is a site that I have bookmarked for those occasions when I am not sure about a word. It is definitely part of my Digital Teaching Toolkit.

The Highs

Or ‘A Study Aid for Teachers and Students’

‘The Highs’ talk about general use of the Ngram viewer.

Interesting Charts

The Ngram viewer can be used to compare how often words and phrases appear in Google’s collection of over 5 million books.

If I type two words separated by a comma, for example:


The Google Ngram Viewer produces a chart.

‘Love’ is the blue line, and ‘hate’ is the red line. Now we have an interesting chart we can examine and use to practice the language of explaining charts and graphs.

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Students can discuss steady increases and rapid declines, a sharp rise and a dramatic fall. However, more importantly we can use Ngrams to practice inference.

There are three things we can infer from this graph.

  1. People write about love much more than hate, which gives me hope.
  2. People wrote more about love in past than they do today. Though, this may prove to be a false conclusion.
  3. There was a marked decrease in the amount of times the word ‘love’ appeared in the written record in 1918 and 1940. A sobering thought as we approach Remembrance Day.

It is an example however, of how the Ngram viewer can sometimes provide cultural and historical insights.

Comparing Words

The Ngram viewer is designed to compare words and their frequency. This is useful for helping us to determine which word or phrase has become more common.

Let’s type in the following words:

global warming,climate change

The Google Ngram Viewer produces a chart.

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Both terms seem to appear around 1985 and there doesn’t appear to be much difference until the mid-nineties when there is a marked increase in the use of ‘climate change’.

The phrase ‘global warming’ always suggested an increase in temperature, whereas ‘climate change’ could include unusual weather patterns.

Teachers and students now have the tools to check which word is in common usage.

The Lows

Or ‘Advanced Features’

The Lows aren’t  negative points, but they are more advanced features of the Ngram viewer that are worth considering before presenting data.

Parts of Speech

Words don’t always have the same job. ‘Love’ is both a noun and a verb. The Ngram viewer will count all instances of the word ‘love‘ unless we tell it to specifically search for nouns or verbs.

Let’s type in the following:


The Google Ngram Viewer produces a chart.

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By typing underscore + part of speech (_NOUN), we are able to separate words by their different function. A complete list of tags are available on the Ngram viewer’s information page.

The chart shows that ‘effect‘ is usually used as a noun, and ‘affect‘ is usually used as a verb and demonstrates the frequency of their occurrence in the written record.

However, the Ngram viewer doesn’t always account for human error though. It’s important to be aware that the Ngram viewer is an analytical tool not an intuitive one. Accuracy is discussed on the Ngram viewer’s information page.


Let’s type in the following:

a bottle of *

The asterisk (*) represents a word that follows the phrase and the Google Ngram Viewer produces a chart of the most common words associated with the phrase ‘a bottle of.

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‘A bottle of wine’ was the most common by far, but other drinks such as champagne, water, rum and whiskey are shown on the chart.

By searching for the collocations we are able to put the phrases into more context than if we just searched for the word ‘wine.

A Final Thought

The Ngram viewer can be fun, it can be informative and it can encourage students to think critically about vocabulary. It does have some limitations but overall I think it is a useful tool to be able to refer to.

Thanks for taking the time to read this.

Take care!

Google’s Ngram viewer is best explained in a great TEDx video by two of its creators, Jean-Baptiste Michel and Erez Lieberman Aiden. Subtitles are available in over 30 languages if you download the video from You can also read Google’s information page about the Ngram viewer.

Other Links

This isn’t the first post written about Google Ngram Viewer, and it probably won’t be the last. Here are some links you might be interested in.

Larry Ferlazzo talks about Chronicle. The NY Times’ version of Google’s Ngram Viewer. (24/6/2014)

NOTE: I didn’t realise it at the time, but Larry also produced a love/hate chart using chronicle. It is interesting to compare the differences in the data representation.

Larry Ferlazzo‘s collection of posts that discuss Google’s Ngram viewer. (17/12/2010)

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