Inspired by http://books.google.com/ngrams/ which is where Google has been scanning books and indexing the words in them. You can track the history of words and phrases you are interested in and show how often they come up "in print".
This blog shows words and phrases I thought were interesting.
23 January 2013
Remember "Acid Rain"?
A big environmental issue peaking around 1992 but now fading away.
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