Usage History of 'diapsids'

The following chart shows how frequently 'diapsids' appeared in printed materials over time. For example, the word 'diapsids' occurred 8 times in books in 1912 and 474 times in 2008. From 1912 to 2008, the word 'diapsids' was used a total of 7,223 times in books scanned by Google. See Reference: Google Ngram project.

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