Usage History of 'invalidates'

The following chart shows how frequently 'invalidates' appeared in printed materials over time. For example, the word 'invalidates' occurred 2 times in books in 1659 and 7,982 times in 2008. From 1659 to 2008, the word 'invalidates' was used a total of 235,588 times in books scanned by Google. See Reference: Google Ngram project.

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