hearing vs panel discussion

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. 

panel discussion

noun
  • A conversation about a specific topic conducted by a group of experts, usually either in the presence of an audience or in a broadcast (or both). 

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