entertainer vs headliner

entertainer

noun
  • A person who entertains others, esp. as a profession, as a singer, actor, presenter, dancer, musician, magician, comedian, etc. 

  • Someone who puts on a show for the entertainment or enjoyment of others. 

headliner

noun
  • The headlining band or performer at a concert or similar event; the best-known and first billed musician, comedian, etc., often performing as the final act of the evening. 

  • The interior fabric covering the roof of a vehicle. 

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