Usage History of 'coumarin'

The following chart shows how frequently 'coumarin' appeared in printed materials over time. For example, the word 'coumarin' occurred 4 times in books in 1811 and 4,220 times in 2008. From 1811 to 2008, the word 'coumarin' was used a total of 199,978 times in books scanned by Google. See Reference: Google Ngram project.

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