Usage History of 'heptanes'

The following chart shows how frequently 'heptanes' appeared in printed materials over time. For example, the word 'heptanes' occurred 2 times in books in 1850 and 108 times in 2008. From 1850 to 2008, the word 'heptanes' was used a total of 8,919 times in books scanned by Google. See Reference: Google Ngram project.

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