Usage History of 'mutagens'

The following chart shows how frequently 'mutagens' appeared in printed materials over time. For example, the word 'mutagens' occurred 2 times in books in 1831 and 4,521 times in 2008. From 1831 to 2008, the word 'mutagens' was used a total of 240,143 times in books scanned by Google. See Reference: Google Ngram project.

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