discord vs hearing

discord

noun
  • An inharmonious combination of simultaneously sounded tones; a dissonance. 

  • Any harsh noise, or confused mingling of sounds. 

  • Tension or strife resulting from a lack of agreement; dissension. 

  • Lack of concord, agreement or harmony. 

verb
  • To untie things which are connected by a cord. 

hearing

noun
  • The sense used to perceive sound. 

  • A proceeding at which discussions are heard. 

  • The act by which something is heard. 

  • A legal procedure done before a judge, without a jury, as with an evidentiary hearing. 

adj
  • Able to hear, as opposed to deaf. 

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