Usage History of 'knowns'

The following chart shows how frequently 'knowns' appeared in printed materials over time. For example, the word 'knowns' occurred 2 times in books in 1688 and 2,413 times in 2008. From 1688 to 2008, the word 'knowns' was used a total of 48,631 times in books scanned by Google. See Reference: Google Ngram project.

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