interview vs listenership

interview

noun
  • Any face-to-face meeting, especially of an official or adversarial nature. 

  • A conversation in person (or, by extension, over the telephone, Internet etc.) between a journalist and someone whose opinion or statements he or she wishes to record for publication, broadcast etc. 

  • An audition. 

  • A police interrogation of a suspect or party in an investigation. 

  • A formal meeting, in person, for the assessment of a candidate or applicant. 

verb
  • To ask questions of (somebody); to have an interview. 

  • To be interviewed; to attend an interview. 

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