Usage History of 'perspicacious'

The following chart shows how frequently 'perspicacious' appeared in printed materials over time. For example, the word 'perspicacious' occurred 6 times in books in 1657 and 4,260 times in 2008. From 1657 to 2008, the word 'perspicacious' was used a total of 135,555 times in books scanned by Google. See Reference: Google Ngram project.

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