Usage History of 'unusual'

The following chart shows how frequently 'unusual' appeared in printed materials over time. For example, the word 'unusual' occurred 2 times in books in 1520 and 1,046,501 times in 2008. From 1520 to 2008, the word 'unusual' was used a total of 27,866,582 times in books scanned by Google. See Reference: Google Ngram project.

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