Usage History of 'invalidated'

The following chart shows how frequently 'invalidated' appeared in printed materials over time. For example, the word 'invalidated' occurred 2 times in books in 1582 and 27,593 times in 2008. From 1582 to 2008, the word 'invalidated' was used a total of 864,227 times in books scanned by Google. See Reference: Google Ngram project.

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