discussion vs listenership

discussion

noun
  • Conversation or debate concerning a particular topic. 

  • Text giving further detail on a subject. 

listenership

noun
  • The act of paying attention to a conversation or speech; listening. 

  • The audience that listens to a certain form or genre of audio material (specifically (Internet, radio), an audio broadcast such as a radio program or a podcast). 

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