Usage History of 'ivory'

The following chart shows how frequently 'ivory' appeared in printed materials over time. For example, the word 'ivory' occurred 2 times in books in 1507 and 234,722 times in 2008. From 1507 to 2008, the word 'ivory' was used a total of 6,254,676 times in books scanned by Google. See Reference: Google Ngram project.

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