Usage History of 'heating'

The following chart shows how frequently 'heating' appeared in printed materials over time. For example, the word 'heating' occurred 2 times in books in 1515 and 465,549 times in 2008. From 1515 to 2008, the word 'heating' was used a total of 16,883,465 times in books scanned by Google. See Reference: Google Ngram project.

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