Usage History of 'improves'

The following chart shows how frequently 'improves' appeared in printed materials over time. For example, the word 'improves' occurred 2 times in books in 1524 and 207,071 times in 2008. From 1524 to 2008, the word 'improves' was used a total of 4,154,703 times in books scanned by Google. See Reference: Google Ngram project.

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