Usage History of 'harmine'

The following chart shows how frequently 'harmine' appeared in printed materials over time. For example, the word 'harmine' occurred 8 times in books in 1668 and 192 times in 2008. From 1668 to 2008, the word 'harmine' was used a total of 12,194 times in books scanned by Google. See Reference: Google Ngram project.

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