accustomed vs conventional

accustomed

adj
  • Familiar through use; usual; customary. 

  • Familiar with something through repeated experience; adapted to existing conditions. 

conventional

adj
  • Ordinary, commonplace. 

  • In accordance with a bidding convention, as opposed to a natural bid. 

  • Pertaining to a convention, as in following generally accepted principles, methods and behaviour. 

  • Banal, trite, hackneyed, unoriginal or clichéd. 

  • Pertaining to a weapon which is not a weapon of mass destruction. 

  • Making use of synthetic fertilizers and pesticides. 

noun
  • A conventional gilt-edged security, a kind of bond paying the holder a fixed cash payment (or coupon) every six months until maturity, at which point the holder receives the final payment and the return of the principal. 

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