Usage History of 'ritonavir'

The following chart shows how frequently 'ritonavir' appeared in printed materials over time. For example, the word 'ritonavir' occurred 2 times in books in 1973 and 5,062 times in 2008. From 1973 to 2008, the word 'ritonavir' was used a total of 63,411 times in books scanned by Google. See Reference: Google Ngram project.

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