Usage History of 'impoverishers'

The following chart shows how frequently 'impoverishers' appeared in printed materials over time. For example, the word 'impoverishers' occurred 2 times in books in 1681 and 22 times in 2008. From 1681 to 2008, the word 'impoverishers' was used a total of 530 times in books scanned by Google. See Reference: Google Ngram project.

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