Usage History of 'atoll'

The following chart shows how frequently 'atoll' appeared in printed materials over time. For example, the word 'atoll' occurred 2 times in books in 1631 and 21,602 times in 2008. From 1631 to 2008, the word 'atoll' was used a total of 625,389 times in books scanned by Google. See Reference: Google Ngram project.

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