Usage History of 'pathogenic'

The following chart shows how frequently 'pathogenic' appeared in printed materials over time. For example, the word 'pathogenic' occurred 2 times in books in 1792 and 66,710 times in 2008. From 1792 to 2008, the word 'pathogenic' was used a total of 2,218,968 times in books scanned by Google. See Reference: Google Ngram project.

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