asylum seeker vs returnee

asylum seeker

noun
  • A person who has applied for asylum in a foreign country but has not yet been granted refugee status by that country. 

returnee

noun
  • Someone who comes back or returns, especially to their own country or region. 

  • A person who sends something back. 

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