Usage History of 'parasitism'

The following chart shows how frequently 'parasitism' appeared in printed materials over time. For example, the word 'parasitism' occurred 2 times in books in 1753 and 19,379 times in 2008. From 1753 to 2008, the word 'parasitism' was used a total of 658,556 times in books scanned by Google. See Reference: Google Ngram project.

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