Usage History of 'fissile'

The following chart shows how frequently 'fissile' appeared in printed materials over time. For example, the word 'fissile' occurred 2 times in books in 1657 and 9,884 times in 2008. From 1657 to 2008, the word 'fissile' was used a total of 300,114 times in books scanned by Google. See Reference: Google Ngram project.

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