Usage History of 'allotropy'

The following chart shows how frequently 'allotropy' appeared in printed materials over time. For example, the word 'allotropy' occurred 48 times in books in 1849 and 442 times in 2008. From 1849 to 2008, the word 'allotropy' was used a total of 25,083 times in books scanned by Google. See Reference: Google Ngram project.

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