Devil's Island vs graybar hotel

Devil's Island

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

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

  • An island in the Salvation Islands, Caribbean, Atlantic 

graybar hotel

name
  • jail, prison 

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