Usage History of 'backboard'

The following chart shows how frequently 'backboard' appeared in printed materials over time. For example, the word 'backboard' occurred 4 times in books in 1797 and 6,079 times in 2008. From 1797 to 2008, the word 'backboard' was used a total of 128,489 times in books scanned by Google. See Reference: Google Ngram project.

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