Usage History of 'perphenazine'

The following chart shows how frequently 'perphenazine' appeared in printed materials over time. For example, the word 'perphenazine' occurred 2 times in books in 1936 and 1,389 times in 2008. From 1936 to 2008, the word 'perphenazine' was used a total of 67,451 times in books scanned by Google. See Reference: Google Ngram project.

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