Usage History of 'silica'

The following chart shows how frequently 'silica' appeared in printed materials over time. For example, the word 'silica' occurred 4 times in books in 1729 and 143,310 times in 2008. From 1729 to 2008, the word 'silica' was used a total of 5,382,722 times in books scanned by Google. See Reference: Google Ngram project.

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