Usage History of 'silicas'

The following chart shows how frequently 'silicas' appeared in printed materials over time. For example, the word 'silicas' occurred 2 times in books in 1730 and 1,348 times in 2008. From 1730 to 2008, the word 'silicas' was used a total of 51,400 times in books scanned by Google. See Reference: Google Ngram project.

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