Usage History of 'peptides'

The following chart shows how frequently 'peptides' appeared in printed materials over time. For example, the word 'peptides' occurred 2 times in books in 1820 and 120,309 times in 2008. From 1820 to 2008, the word 'peptides' was used a total of 2,816,066 times in books scanned by Google. See Reference: Google Ngram project.

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