Answered By: Colleen Bryant
Last Updated: May 22, 2017     Views: 9

The Google Ngram charts changes in word frequency. See here for more information on what it covers.

HathiTrust uses a tool called Bookworm.  You can read more about that here.

There is a tool for the full run of the New York Times:

The US News Map charts word use from US newspapers from 1789 to 1922.

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