airliner vs airplane

airliner

noun
  • A passenger-carrying aircraft, especially one of a fleet operated by an airline. 

airplane

noun
  • A powered heavier-than-air aircraft with fixed wings. 

verb
  • To transport by aeroplane. 

  • To fly in an aeroplane. 

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