listenership vs notice

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). 

notice

noun
  • The act of observing; perception. 

  • A published critical review of a play or the like. 

  • A written or printed announcement. 

  • Advance notification of termination of employment, given by an employer to an employee or vice versa. 

  • A formal notification or warning. 

  • Prior notification. 

verb
  • To be noticeable; to show. 

  • To become aware of; to observe. 

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