hearing vs topic

hearing

noun
  • A proceeding at which discussions are heard. 

  • The sense used to perceive sound. 

  • 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. 

topic

noun
  • Discussion thread. 

  • Subject; theme; a category or general area of interest. 

  • A musical sign intended to suggest a particular style or genre. 

adj
  • topical 

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