Usage History of 'retrogresses'

The following chart shows how frequently 'retrogresses' appeared in printed materials over time. For example, the word 'retrogresses' occurred 2 times in books in 1848 and 72 times in 2008. From 1848 to 2008, the word 'retrogresses' was used a total of 6,490 times in books scanned by Google. See Reference: Google Ngram project.

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