Usage History of 'nongraded'

The following chart shows how frequently 'nongraded' appeared in printed materials over time. For example, the word 'nongraded' occurred 2 times in books in 1920 and 852 times in 2008. From 1920 to 2008, the word 'nongraded' was used a total of 75,442 times in books scanned by Google. See Reference: Google Ngram project.

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