The dataset comes from google books in various languages. Be sure to visualize your own queries at: http://ngrams.googlelabs.com/ http://ngrams.googlelabs.com/

The dataset comes from google books in various languages. Be sure to visualize your own queries at: http://ngrams.googlelabs.com/ http://ngrams.googlelabs.com/ I've got the info from this article: http://www.technologyreview.com/computing/26937/ http://www.technologyreview.com/computing/26937/