Deal vs Mainland

Deal

name
  • A coastal town in Kent, England. 

Mainland

name
  • A historical region in British Columbia, British North America, British Empire 

  • The largest island in the Orkney Islands council area, to the north of Scotland. 

  • The largest island in the Shetland Islands council area, to the north of both Orkney and Scotland. 

How often have the words Deal and Mainland occurred in a corpus of books? (source: Google Ngram Viewer )