Usage History of 'morphine'

The following chart shows how frequently 'morphine' appeared in printed materials over time. For example, the word 'morphine' occurred 2 times in books in 1805 and 85,228 times in 2008. From 1805 to 2008, the word 'morphine' was used a total of 2,899,622 times in books scanned by Google. See Reference: Google Ngram project.

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