Usage History of 'unstrained'

The following chart shows how frequently 'unstrained' appeared in printed materials over time. For example, the word 'unstrained' occurred 4 times in books in 1660 and 2,698 times in 2008. From 1660 to 2008, the word 'unstrained' was used a total of 100,288 times in books scanned by Google. See Reference: Google Ngram project.

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