Usage History of 'poriferans'

The following chart shows how frequently 'poriferans' appeared in printed materials over time. For example, the word 'poriferans' occurred 8 times in books in 1888 and 69 times in 2008. From 1888 to 2008, the word 'poriferans' was used a total of 2,015 times in books scanned by Google. See Reference: Google Ngram project.

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