Usage History of 'keep'

The following chart shows how frequently 'keep' appeared in printed materials over time. For example, the word 'keep' occurred 2 times in books in 1505 and 7,702,149 times in 2008. From 1505 to 2008, the word 'keep' was used a total of 147,389,304 times in books scanned by Google. See Reference: Google Ngram project.

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