Usage History of 'wormholes'

The following chart shows how frequently 'wormholes' appeared in printed materials over time. For example, the word 'wormholes' occurred 2 times in books in 1691 and 3,137 times in 2008. From 1691 to 2008, the word 'wormholes' was used a total of 52,763 times in books scanned by Google. See Reference: Google Ngram project.

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