Usage History of 'watercourses'

The following chart shows how frequently 'watercourses' appeared in printed materials over time. For example, the word 'watercourses' occurred 2 times in books in 1669 and 19,004 times in 2008. From 1669 to 2008, the word 'watercourses' was used a total of 490,326 times in books scanned by Google. See Reference: Google Ngram project.

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