Usage History of 'planation'

The following chart shows how frequently 'planation' appeared in printed materials over time. For example, the word 'planation' occurred 2 times in books in 1675 and 2,040 times in 2008. From 1675 to 2008, the word 'planation' was used a total of 94,758 times in books scanned by Google. See Reference: Google Ngram project.

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