Usage History of 'certifying'

The following chart shows how frequently 'certifying' appeared in printed materials over time. For example, the word 'certifying' occurred 2 times in books in 1563 and 25,955 times in 2008. From 1563 to 2008, the word 'certifying' was used a total of 712,723 times in books scanned by Google. See Reference: Google Ngram project.

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