Usage History of 'reciprocal'

The following chart shows how frequently 'reciprocal' appeared in printed materials over time. For example, the word 'reciprocal' occurred 8 times in books in 1505 and 252,748 times in 2008. From 1505 to 2008, the word 'reciprocal' was used a total of 7,720,922 times in books scanned by Google. See Reference: Google Ngram project.

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