mainlander vs sunbird

mainlander

noun
  • Someone who lives in mainland Europe, as opposed to the British Isles. 

  • A person from mainland China, as opposed to someone from Hong Kong, Macau or Taiwan. 

  • Someone who lives on the mainland. 

sunbird

noun
  • A person, usually one who is retired, who travels from a warm climate to a colder one in the summer; one who oversummers elsewhere. 

  • A bird belonging to any of several species in the family Nectariniidae. 

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