Usage History of 'proper'

The following chart shows how frequently 'proper' appeared in printed materials over time. For example, the word 'proper' occurred 4 times in books in 1505 and 3,039,158 times in 2008. From 1505 to 2008, the word 'proper' was used a total of 84,236,082 times in books scanned by Google. See Reference: Google Ngram project.

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