Usage History of 'piggybacks'

The following chart shows how frequently 'piggybacks' appeared in printed materials over time. For example, the word 'piggybacks' occurred 1 time in books in 1918 and 667 times in 2008. From 1918 to 2008, the word 'piggybacks' was used a total of 9,573 times in books scanned by Google. See Reference: Google Ngram project.

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