Usage History of 'controversial'

The following chart shows how frequently 'controversial' appeared in printed materials over time. For example, the word 'controversial' occurred 2 times in books in 1515 and 390,920 times in 2008. From 1515 to 2008, the word 'controversial' was used a total of 9,146,267 times in books scanned by Google. See Reference: Google Ngram project.

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