Usage History of 'factorials'

The following chart shows how frequently 'factorials' appeared in printed materials over time. For example, the word 'factorials' occurred 2 times in books in 1839 and 1,646 times in 2008. From 1839 to 2008, the word 'factorials' was used a total of 57,080 times in books scanned by Google. See Reference: Google Ngram project.

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