Usage History of 'isotypes'

The following chart shows how frequently 'isotypes' appeared in printed materials over time. For example, the word 'isotypes' occurred 2 times in books in 1917 and 3,239 times in 2008. From 1917 to 2008, the word 'isotypes' was used a total of 70,526 times in books scanned by Google. See Reference: Google Ngram project.

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