Usage History of 'planner'

The following chart shows how frequently 'planner' appeared in printed materials over time. For example, the word 'planner' occurred 2 times in books in 1584 and 85,272 times in 2008. From 1584 to 2008, the word 'planner' was used a total of 2,379,151 times in books scanned by Google. See Reference: Google Ngram project.

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