Usage History of 'hydrogenation'

The following chart shows how frequently 'hydrogenation' appeared in printed materials over time. For example, the word 'hydrogenation' occurred 2 times in books in 1803 and 14,460 times in 2008. From 1803 to 2008, the word 'hydrogenation' was used a total of 761,116 times in books scanned by Google. See Reference: Google Ngram project.

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