Applications for Education.
As I mentioned in the video above, the Ngram Viewer can offer an excellent way to start a research activity for students. Have them get in a few words then examine the chart to identify peaks and valleys in the frequency of the words use. Then ask them to try to determine what would have triggered those words to be used more or less regularly at different durations in history.

By the way, the book that I pointed out in the video is That Wild Country by Mark Kenyon..

Ngram Viewer is a search tool that trainees can use to check out the usage of words and names in books released in between 1800 and 2019. The Ngram Viewer reveals users a graph illustrating the very first appearance of a word or name in literature and the frequency with which that word or name appears in literature because 1800. The Ngram Viewer will let you compare the usage of several words or names in one chart.

Googles.
Ngram Viewer is a search tool that trainees can use to check out using words and names in books published between 1800 and 2019. The Ngram Viewer reveals users a chart showing the very first appearance of a word or name in literature and the frequency with which that word or name appears in literature since 1800. The graph is based on the books and periodicals that are indexed in Google Books.

The Ngram Viewer will let you compare making use of multiple words or names in one graph. The example that I offer in this video is to compare using the terms “National Parks,” “National Forests,” and “National Forest Service.” By taking a look at the Ngram Viewer for those terms I can see that they begin to appear more regularly around 1890, have a lull in the 1940s and 1950s, and then appear more often once again in the 1960s..
Ngram Viewer is based upon books indexed in Google Books. That is why listed below every chart produced by Ngram Viewer you will discover a list of books about each of your search terms. Those books are arranged by date..
A 3rd element of Ngram Viewer to keep in mind is that it deals with several languages consisting of English, French, Chinese, German, Italian, Russian, Hebrew, and Spanish..