Usage History of 'unzipping'

The following chart shows how frequently 'unzipping' appeared in printed materials over time. For example, the word 'unzipping' occurred 2 times in books in 1933 and 3,618 times in 2008. From 1933 to 2008, the word 'unzipping' was used a total of 55,588 times in books scanned by Google. See Reference: Google Ngram project.

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