We've now spent half the day playing with Google's new ngram app that by searching all the digitized books, allows you trace the usage of a word over several centuries. We've done comparisons--the use of "men" is tanking while "women" is fast on the rise. And we've traced odd ones: "Snookie" dates back to the 1920s and "dude" peaked in the 1600s. Add your favorites and we'll do this again.
ngrams slide show