Usage History of 'methylation'

The following chart shows how frequently 'methylation' appeared in printed materials over time. For example, the word 'methylation' occurred 4 times in books in 1865 and 53,587 times in 2008. From 1865 to 2008, the word 'methylation' was used a total of 782,206 times in books scanned by Google. See Reference: Google Ngram project.

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