Usage History of 'ascertains'

The following chart shows how frequently 'ascertains' appeared in printed materials over time. For example, the word 'ascertains' occurred 2 times in books in 1656 and 5,507 times in 2008. From 1656 to 2008, the word 'ascertains' was used a total of 156,892 times in books scanned by Google. See Reference: Google Ngram project.

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