Usage History of 'handbooks'

The following chart shows how frequently 'handbooks' appeared in printed materials over time. For example, the word 'handbooks' occurred 2 times in books in 1572 and 34,282 times in 2008. From 1572 to 2008, the word 'handbooks' was used a total of 1,153,935 times in books scanned by Google. See Reference: Google Ngram project.

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