audition vs listenership

audition

noun
  • An act of hearing; being heard. 

  • A performance, by an aspiring performer, to demonstrate suitability or talent. 

  • Something heard. 

  • The sense of hearing. 

verb
  • To evaluate one or more performers in through an audition. 

  • To take part in such a performance. 

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