pal vs stranger

pal

verb
  • Be friends with, hang around with. 

noun
  • An informal term of address, often used ironically in a hostile way. 

  • A friend, buddy, mate, cobber; someone to hang around with. 

stranger

noun
  • One who has not been seen for a long time. 

  • A person whom one does not know; a person who is neither a friend nor an acquaintance. 

  • A newcomer. 

  • An outsider or foreigner. 

  • One not admitted to communion or fellowship. 

  • One not privy or party to an act, contract, or title; a mere intruder or intermeddler; one who interferes without right. 

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