Usage History of 'carpooling'

The following chart shows how frequently 'carpooling' appeared in printed materials over time. For example, the word 'carpooling' occurred 6 times in books in 1925 and 2,661 times in 2008. From 1925 to 2008, the word 'carpooling' was used a total of 34,406 times in books scanned by Google. See Reference: Google Ngram project.

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