Usage History of 'unrequited'

The following chart shows how frequently 'unrequited' appeared in printed materials over time. For example, the word 'unrequited' occurred 2 times in books in 1595 and 19,919 times in 2008. From 1595 to 2008, the word 'unrequited' was used a total of 421,829 times in books scanned by Google. See Reference: Google Ngram project.

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