Usage History of 'inspheres'

The following chart shows how frequently 'inspheres' appeared in printed materials over time. For example, the word 'inspheres' occurred 2 times in books in 1824 and 30 times in 2008. From 1824 to 2008, the word 'inspheres' was used a total of 463 times in books scanned by Google. See Reference: Google Ngram project.

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