Usage History of 'infiltrate'

The following chart shows how frequently 'infiltrate' appeared in printed materials over time. For example, the word 'infiltrate' occurred 2 times in books in 1777 and 37,718 times in 2008. From 1777 to 2008, the word 'infiltrate' was used a total of 1,004,899 times in books scanned by Google. See Reference: Google Ngram project.

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