Usage History of 'unobtainable'

The following chart shows how frequently 'unobtainable' appeared in printed materials over time. For example, the word 'unobtainable' occurred 2 times in books in 1574 and 8,926 times in 2008. From 1574 to 2008, the word 'unobtainable' was used a total of 364,127 times in books scanned by Google. See Reference: Google Ngram project.

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