Usage History of 'urethane'

The following chart shows how frequently 'urethane' appeared in printed materials over time. For example, the word 'urethane' occurred 6 times in books in 1841 and 7,061 times in 2008. From 1841 to 2008, the word 'urethane' was used a total of 332,255 times in books scanned by Google. See Reference: Google Ngram project.

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