Usage History of 'isochron'

The following chart shows how frequently 'isochron' appeared in printed materials over time. For example, the word 'isochron' occurred 8 times in books in 1876 and 1,652 times in 2008. From 1876 to 2008, the word 'isochron' was used a total of 82,727 times in books scanned by Google. See Reference: Google Ngram project.

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