The Ngram Viewer will let you compare the usage of numerous words or names in one chart. The example that I provide in this video is to compare making use of 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 regularly around 1890, have a lull in the 1940s and 1950s, and then appear more frequently once again in the 1960s..
Ngram Viewer is based on books indexed in Google Books. That is why listed below every chart created by Ngram Viewer you will find a list of books about each of your search terms. Those books are set up by date..
A 3rd component of Ngram Viewer to note is that it deals with multiple languages consisting of English, French, Chinese, German, Italian, Russian, Hebrew, and Spanish..

Applications for Education.
As I mentioned in the video above, the Ngram Viewer can offer an excellent way to start a research study activity for students. 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 used more or less often at different durations in history.

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

By the method, the book that I mentioned in the video is That Wild Country by Mark Kenyon..

Googles.
Ngram Viewer is a search tool that students can utilize to explore using words and names in books published in between 1800 and 2019. The Ngram Viewer reveals users a graph illustrating the first appearance of a word or name in literature and the frequency with which that word or name appears in literature since 1800. The chart is based upon the books and periodicals that are indexed in Google Books.