The New York Times has a very cool interactive graph showing the words that were used in all of Bush’s State of the Union addresses. You can search for any word (“Iraq”, “Terror”, “Mass Destruction”) and see how its use has fared over the course of seven SOTU speeches.

Beyond that, it actually shows where in the course of the speech it was used (on a timeline) with a link to see the word used in context.

Very impressive.