conference vs listenership

conference

noun
  • The act of consulting together formally; serious conversation or discussion; interchange of views. 

  • A voluntary association of Congregational churches of a district; the district in which such churches are. 

  • A multilateral diplomatic negotiation. 

  • An event organized by a for-profit or non-profit organization to discuss a pressing issue, such as a new product, market trend or government regulation, with a range of speakers. 

  • A constituent tournament of a sports league in a given season. 

  • A stated meeting of preachers and others, invested with authority to take cognizance of ecclesiastical matters. 

  • A group of sports teams that play each other on a regular basis. 

  • A formal event where scientists present their research results in speeches, workshops, posters or by other means. 

verb
  • To assess (a student) by one-on-one conversation, rather than an examination. 

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