Usage History of 'penicillium'

The following chart shows how frequently 'penicillium' appeared in printed materials over time. For example, the word 'penicillium' occurred 4 times in books in 1800 and 9,139 times in 2008. From 1800 to 2008, the word 'penicillium' was used a total of 357,309 times in books scanned by Google. See Reference: Google Ngram project.

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