Usage History of 'zirconia'

The following chart shows how frequently 'zirconia' appeared in printed materials over time. For example, the word 'zirconia' occurred 6 times in books in 1800 and 8,656 times in 2008. From 1800 to 2008, the word 'zirconia' was used a total of 278,205 times in books scanned by Google. See Reference: Google Ngram project.

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