Usage History of 'checklists'

The following chart shows how frequently 'checklists' appeared in printed materials over time. For example, the word 'checklists' occurred 4 times in books in 1751 and 36,188 times in 2008. From 1751 to 2008, the word 'checklists' was used a total of 730,002 times in books scanned by Google. See Reference: Google Ngram project.

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