Usage History of 'isopleth'

The following chart shows how frequently 'isopleth' appeared in printed materials over time. For example, the word 'isopleth' occurred 4 times in books in 1902 and 573 times in 2008. From 1902 to 2008, the word 'isopleth' was used a total of 42,108 times in books scanned by Google. See Reference: Google Ngram project.

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