Usage History of 'plagioclase'

The following chart shows how frequently 'plagioclase' appeared in printed materials over time. For example, the word 'plagioclase' occurred 42 times in books in 1862 and 10,881 times in 2008. From 1862 to 2008, the word 'plagioclase' was used a total of 939,141 times in books scanned by Google. See Reference: Google Ngram project.

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