Usage History of 'amphibia'

The following chart shows how frequently 'amphibia' appeared in printed materials over time. For example, the word 'amphibia' occurred 2 times in books in 1642 and 6,439 times in 2008. From 1642 to 2008, the word 'amphibia' was used a total of 404,279 times in books scanned by Google. See Reference: Google Ngram project.

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