Usage History of 'percolators'

The following chart shows how frequently 'percolators' appeared in printed materials over time. For example, the word 'percolators' occurred 4 times in books in 1768 and 324 times in 2008. From 1768 to 2008, the word 'percolators' was used a total of 20,988 times in books scanned by Google. See Reference: Google Ngram project.

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