befriend vs exile

befriend

verb
  • To favor. 

  • To become a friend of, to make friends with. 

exile

noun
  • The state of being banished from one's home or country. 

  • Someone who is banished from their home or country. 

verb
  • To send (someone or something) into exile. 

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