Usage History of 'earthquake'

The following chart shows how frequently 'earthquake' appeared in printed materials over time. For example, the word 'earthquake' occurred 20 times in books in 1524 and 302,217 times in 2008. From 1524 to 2008, the word 'earthquake' was used a total of 6,887,026 times in books scanned by Google. See Reference: Google Ngram project.

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