Usage History of 'impassibly'

The following chart shows how frequently 'impassibly' appeared in printed materials over time. For example, the word 'impassibly' occurred 4 times in books in 1810 and 196 times in 2008. From 1810 to 2008, the word 'impassibly' was used a total of 2,798 times in books scanned by Google. See Reference: Google Ngram project.

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