Usage History of 'etiologies'

The following chart shows how frequently 'etiologies' appeared in printed materials over time. For example, the word 'etiologies' occurred 2 times in books in 1749 and 18,154 times in 2008. From 1749 to 2008, the word 'etiologies' was used a total of 350,137 times in books scanned by Google. See Reference: Google Ngram project.

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