Usage History of 'carcinogen'

The following chart shows how frequently 'carcinogen' appeared in printed materials over time. For example, the word 'carcinogen' occurred 4 times in books in 1853 and 13,897 times in 2008. From 1853 to 2008, the word 'carcinogen' was used a total of 509,260 times in books scanned by Google. See Reference: Google Ngram project.

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