Usage History of 'knuckleballer'

The following chart shows how frequently 'knuckleballer' appeared in printed materials over time. For example, the word 'knuckleballer' occurred 2 times in books in 1957 and 139 times in 2008. From 1957 to 2008, the word 'knuckleballer' was used a total of 3,021 times in books scanned by Google. See Reference: Google Ngram project.

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