View Occurrences of Terms in Google Books Here's a fun little tool built off the enormous Google Books database. The Google Books Ngram Viewer (https://books.google.com/ngrams...) allows you to plug in multiple terms and see how they compare in terms of mentions in books over the years. The index currently runs from 1800 to 2008. Below I... - https://picasaweb.google.com/1070220...