Usage History of 'isoprene'

The following chart shows how frequently 'isoprene' appeared in printed materials over time. For example, the word 'isoprene' occurred 4 times in books in 1866 and 5,737 times in 2008. From 1866 to 2008, the word 'isoprene' was used a total of 218,706 times in books scanned by Google. See Reference: Google Ngram project.

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