Usage History of 'rotiform'

The following chart shows how frequently 'rotiform' appeared in printed materials over time. For example, the word 'rotiform' occurred 4 times in books in 1816 and 5 times in 2008. From 1816 to 2008, the word 'rotiform' was used a total of 52 times in books scanned by Google. See Reference: Google Ngram project.

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