Usage History of 'terraformed'

The following chart shows how frequently 'terraformed' appeared in printed materials over time. For example, the word 'terraformed' occurred 2 times in books in 1957 and 239 times in 2008. From 1957 to 2008, the word 'terraformed' was used a total of 4,812 times in books scanned by Google. See Reference: Google Ngram project.

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