Usage History of 'ferns'

The following chart shows how frequently 'ferns' appeared in printed materials over time. For example, the word 'ferns' occurred 2 times in books in 1629 and 91,375 times in 2008. From 1629 to 2008, the word 'ferns' was used a total of 2,199,691 times in books scanned by Google. See Reference: Google Ngram project.

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