Usage History of 'hippopotami'

The following chart shows how frequently 'hippopotami' appeared in printed materials over time. For example, the word 'hippopotami' occurred 2 times in books in 1694 and 4,699 times in 2008. From 1694 to 2008, the word 'hippopotami' was used a total of 103,265 times in books scanned by Google. See Reference: Google Ngram project.

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