Usage History of 'earplugs'

The following chart shows how frequently 'earplugs' appeared in printed materials over time. For example, the word 'earplugs' occurred 2 times in books in 1860 and 6,440 times in 2008. From 1860 to 2008, the word 'earplugs' was used a total of 106,628 times in books scanned by Google. See Reference: Google Ngram project.

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