Google's Ngram Viewer

I've been seeing many blurbs the past couple weeks about Google Books Ngram Viewer (way to mine text for word usage). I thought this blog entry provided some good links to the pros and cons of Ngram.

http://www.dancohen.org/2010/12/19/initial-thoughts-on-the-google-books-ngram-viewer-and-datasets/

From Google Labs (details):

See how often phrases have occurred in the world's books over the years. Google Books has scanned over 10% of all books ever published, and now you can graph the occurrence of phrases up to five words in length from 1400 through the present day right in your browser. We currently support the following languages:

• Chinese
• English
• French
• German
• Hebrew
• Russian