Usage History of 'iritis'

The following chart shows how frequently 'iritis' appeared in printed materials over time. For example, the word 'iritis' occurred 2 times in books in 1507 and 5,015 times in 2008. From 1507 to 2008, the word 'iritis' was used a total of 313,618 times in books scanned by Google. See Reference: Google Ngram project.

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