Usage History of 'protease'

The following chart shows how frequently 'protease' appeared in printed materials over time. For example, the word 'protease' occurred 2 times in books in 1807 and 48,981 times in 2008. From 1807 to 2008, the word 'protease' was used a total of 1,099,689 times in books scanned by Google. See Reference: Google Ngram project.

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