Usage History of 'humidified'

The following chart shows how frequently 'humidified' appeared in printed materials over time. For example, the word 'humidified' occurred 4 times in books in 1895 and 4,600 times in 2008. From 1895 to 2008, the word 'humidified' was used a total of 137,056 times in books scanned by Google. See Reference: Google Ngram project.

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