refugee vs restrain

refugee

verb
  • To convey (slaves) away from the advance of the federal forces. 

noun
  • A person seeking refuge due to a natural disaster, war, etc. 

  • A person who flees one place or institution for another. 

  • A person seeking refuge in a foreign country out of fear of political persecution or the prospect of such persecution in their home country, i.e., a person seeking political asylum. 

  • A person formally granted political or economic asylum by a country other than their home country. 

restrain

verb
  • To deprive of liberty. 

  • To control or keep in check. 

  • To strain again. 

  • To restrict or limit. 

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