Usage History of 'tamperproof'

The following chart shows how frequently 'tamperproof' appeared in printed materials over time. For example, the word 'tamperproof' occurred 2 times in books in 1900 and 506 times in 2008. From 1900 to 2008, the word 'tamperproof' was used a total of 11,436 times in books scanned by Google. See Reference: Google Ngram project.

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