Usage History of 'discoloration'

The following chart shows how frequently 'discoloration' appeared in printed materials over time. For example, the word 'discoloration' occurred 2 times in books in 1574 and 25,344 times in 2008. From 1574 to 2008, the word 'discoloration' was used a total of 968,520 times in books scanned by Google. See Reference: Google Ngram project.

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