The Ngram Viewer will let you compare the use of multiple words or names in one chart. The example that I give up this video is to compare using the terms “National Parks,” “National Forests,” and “National Forest Service.” By looking at the Ngram Viewer for those terms I can see that they start to appear more often around 1890, have a lull in the 1940s and 1950s, and after that appear more frequently again in the 1960s..
Ngram Viewer is based on books indexed in Google Books. That is why listed below every graph created by Ngram Viewer you will find a list of books about each of your search terms. Those books are organized by date..
A third part of Ngram Viewer to note is that it deals with numerous languages including English, French, Chinese, German, Italian, Russian, Hebrew, and Spanish..

Googles.
Ngram Viewer is a search tool that trainees can use to explore using words and names in books released between 1800 and 2019. The Ngram Viewer shows users a graph highlighting the first appearance of a word or name in literature and the frequency with which that word or name appears in literature given that 1800. The chart is based upon the books and periodicals that are indexed in Google Books.

Ngram Viewer is a search tool that students can utilize to check out the use of words and names in books published in between 1800 and 2019. The Ngram Viewer shows users a chart highlighting the very first appearance of a word or name in literature and the frequency with which that word or name appears in literature given that 1800. The Ngram Viewer will let you compare the usage of numerous words or names in one graph.

Applications for Education.
As I mentioned in the video above, the Ngram Viewer can supply an excellent way to begin a research study activity for trainees. Have them go into a couple of words then examine the graph to recognize peaks and valleys in the frequency of the words use. Ask them to try to determine what would have caused those words to be utilized more or less regularly at various durations in history.

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