Usage History of 'zircon'

The following chart shows how frequently 'zircon' appeared in printed materials over time. For example, the word 'zircon' occurred 2 times in books in 1738 and 12,197 times in 2008. From 1738 to 2008, the word 'zircon' was used a total of 468,578 times in books scanned by Google. See Reference: Google Ngram project.

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