Usage History of 'zymogens'

The following chart shows how frequently 'zymogens' appeared in printed materials over time. For example, the word 'zymogens' occurred 4 times in books in 1878 and 1,183 times in 2008. From 1878 to 2008, the word 'zymogens' was used a total of 32,263 times in books scanned by Google. See Reference: Google Ngram project.

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