Another fun time-suck Friday, 17 December 2010 09:12:45 CST David-Braverman Work (0) Also from Sullivan: It's called the Books Ngram Viewer, and it allows you to track the plot of words and phrases through time. The service draws on the absolutely massive Google Books corpus. Google estimates they've scanned and OCR'd 10 percent of all the books ever published, so this isn't a perfect dataset. But man is it fun to play with.