Usage History of 'keypad'

The following chart shows how frequently 'keypad' appeared in printed materials over time. For example, the word 'keypad' occurred 2 times in books in 1777 and 15,105 times in 2008. From 1777 to 2008, the word 'keypad' was used a total of 286,699 times in books scanned by Google. See Reference: Google Ngram project.

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