Usage History of 'riffles'

The following chart shows how frequently 'riffles' appeared in printed materials over time. For example, the word 'riffles' occurred 2 times in books in 1667 and 4,818 times in 2008. From 1667 to 2008, the word 'riffles' was used a total of 151,780 times in books scanned by Google. See Reference: Google Ngram project.

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