hearing vs percussion

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. 

percussion

noun
  • The sound so produced. 

  • The detonation of a percussion cap in a firearm. 

  • The tapping of the body as an aid to medical diagnosis. 

  • The repeated striking of an object to break or shape it, as in percussion drilling. 

  • The outer side of the hand. 

  • The collision of two bodies in order to produce a sound. 

  • The section of an orchestra or band containing percussion instruments; such instruments considered as a group; in bands, may be separate from drum kits. 

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