Google offers you an archive of their press releases from 1999 to 2007. A lot has happened in those 8 years, and you can analyze some of the changes – or to be more precise, the changes Google decided to publicly communicate – by comparing word counts for each year. I wrote a little tool to automate this, and below you can see some samples.
Technical notes: this tool counts the occurrences of a specific word among all press releases of a year and compares it to the overall number of words that year, to then zoom in for a clearer view. The recurring Google’s Zeitgeist releases have been excluded. Also, the search finds word parts as well as full words (and ignores case), so a search for “deja