Usage History of 'hydrocracker'

The following chart shows how frequently 'hydrocracker' appeared in printed materials over time. For example, the word 'hydrocracker' occurred 2 times in books in 1900 and 188 times in 2008. From 1900 to 2008, the word 'hydrocracker' was used a total of 9,274 times in books scanned by Google. See Reference: Google Ngram project.

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