Usage History of 'impassive'

The following chart shows how frequently 'impassive' appeared in printed materials over time. For example, the word 'impassive' occurred 2 times in books in 1635 and 41,292 times in 2008. From 1635 to 2008, the word 'impassive' was used a total of 692,749 times in books scanned by Google. See Reference: Google Ngram project.

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