Usage History of 'zippered'

The following chart shows how frequently 'zippered' appeared in printed materials over time. For example, the word 'zippered' occurred 2 times in books in 1900 and 3,474 times in 2008. From 1900 to 2008, the word 'zippered' was used a total of 71,801 times in books scanned by Google. See Reference: Google Ngram project.

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