Usage History of 'pterodactyls'

The following chart shows how frequently 'pterodactyls' appeared in printed materials over time. For example, the word 'pterodactyls' occurred 2 times in books in 1815 and 1,656 times in 2008. From 1815 to 2008, the word 'pterodactyls' was used a total of 39,188 times in books scanned by Google. See Reference: Google Ngram project.

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