Usage History of 'urethra'

The following chart shows how frequently 'urethra' appeared in printed materials over time. For example, the word 'urethra' occurred 2 times in books in 1681 and 56,501 times in 2008. From 1681 to 2008, the word 'urethra' was used a total of 2,727,230 times in books scanned by Google. See Reference: Google Ngram project.

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