Usage History of 'irritated'

The following chart shows how frequently 'irritated' appeared in printed materials over time. For example, the word 'irritated' occurred 4 times in books in 1524 and 169,018 times in 2008. From 1524 to 2008, the word 'irritated' was used a total of 3,524,470 times in books scanned by Google. See Reference: Google Ngram project.

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