entertainment vs phone-in

entertainment

noun
  • A show put on for the enjoyment or amusement of others. 

  • An activity designed to give pleasure, enjoyment, diversion, amusement, or relaxation to an audience, no matter whether the audience participates passively as in watching opera or a movie, or actively as in games. 

phone-in

noun
  • A show requiring members of the public to telephone the studio. 

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