Usage History of 'impurer'

The following chart shows how frequently 'impurer' appeared in printed materials over time. For example, the word 'impurer' occurred 2 times in books in 1698 and 136 times in 2008. From 1698 to 2008, the word 'impurer' was used a total of 3,228 times in books scanned by Google. See Reference: Google Ngram project.

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