Usage History of 'humidifies'

The following chart shows how frequently 'humidifies' appeared in printed materials over time. For example, the word 'humidifies' occurred 6 times in books in 1895 and 170 times in 2008. From 1895 to 2008, the word 'humidifies' was used a total of 4,998 times in books scanned by Google. See Reference: Google Ngram project.

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