expatriate vs refoulement

expatriate

noun
  • One who has been banished from one's own country. 

  • One who lives outside one's own country. 

adj
  • Living outside of one's own country. 

verb
  • To withdraw from one’s native country. 

  • To banish; to drive or force (a person) from his own country; to make an exile of. 

  • To renounce the rights and liabilities of citizenship where one is born and become a citizen of another country. 

refoulement

noun
  • Rendition of a person to an area (chiefly their country of origin) where they will face mistreatment, for example, expulsion of refugees into a war zone; (countable) an instance of this. 

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