Usage History of 'amniotes'

The following chart shows how frequently 'amniotes' appeared in printed materials over time. For example, the word 'amniotes' occurred 6 times in books in 1875 and 1,880 times in 2008. From 1875 to 2008, the word 'amniotes' was used a total of 49,670 times in books scanned by Google. See Reference: Google Ngram project.

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