Usage History of 'cooperated'

The following chart shows how frequently 'cooperated' appeared in printed materials over time. For example, the word 'cooperated' occurred 2 times in books in 1668 and 36,301 times in 2008. From 1668 to 2008, the word 'cooperated' was used a total of 1,184,736 times in books scanned by Google. See Reference: Google Ngram project.

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