Devil's Island vs gaol

Devil's Island

name

  • Former name of Bermuda. An archipelago in North America, in the Atlantic 

  • An island in the Salvation Islands, Caribbean, Atlantic 

  • A former settlement, a penal colony in Devil's Island, Salvation Islands, Kourou, French Guyana, South America, in the Caribean 

gaol

verb

  • Dated spelling of jail. 

noun

  • Dated spelling of jail. 

How often have the words Devil's Island and gaol occurred in a corpus of books? (source: Google Ngram Viewer )