Usage History of 'knurling'

The following chart shows how frequently 'knurling' appeared in printed materials over time. For example, the word 'knurling' occurred 2 times in books in 1781 and 375 times in 2008. From 1781 to 2008, the word 'knurling' was used a total of 23,814 times in books scanned by Google. See Reference: Google Ngram project.

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