consultation vs listenership

consultation

noun
  • The act of consulting. 

  • A conference for the exchange of information and advice. 

  • An appointment or meeting with a professional person, such as a doctor. 

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 consultation and listenership occurred in a corpus of books? (source: Google Ngram Viewer )