Usage History of 'permeation'

The following chart shows how frequently 'permeation' appeared in printed materials over time. For example, the word 'permeation' occurred 4 times in books in 1607 and 18,947 times in 2008. From 1607 to 2008, the word 'permeation' was used a total of 579,345 times in books scanned by Google. See Reference: Google Ngram project.

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