Usage History of 'wool'

The following chart shows how frequently 'wool' appeared in printed materials over time. For example, the word 'wool' occurred 2 times in books in 1520 and 400,641 times in 2008. From 1520 to 2008, the word 'wool' was used a total of 13,040,791 times in books scanned by Google. See Reference: Google Ngram project.

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