abnormal vs conventional

abnormal

adj
  • Not conforming to rule or system; deviating from the usual or normal type. 

  • Of or pertaining to that which is irregular, in particular, behaviour that deviates from norms of social propriety or accepted standards of mental health. 

noun
  • A person or object that is not normal. 

conventional

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

  • Ordinary, commonplace. 

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

  • 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 abnormal and conventional occurred in a corpus of books? (source: Google Ngram Viewer )