Usage History of 'exospheric'

The following chart shows how frequently 'exospheric' appeared in printed materials over time. For example, the word 'exospheric' occurred 4 times in books in 1950 and 549 times in 2008. From 1950 to 2008, the word 'exospheric' was used a total of 15,422 times in books scanned by Google. See Reference: Google Ngram project.

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