Usage History of 'tester'

The following chart shows how frequently 'tester' appeared in printed materials over time. For example, the word 'tester' occurred 4 times in books in 1588 and 44,274 times in 2008. From 1588 to 2008, the word 'tester' was used a total of 1,243,704 times in books scanned by Google. See Reference: Google Ngram project.

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