headliner vs soloist

headliner

noun
  • The interior fabric covering the roof of a vehicle. 

  • 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. 

soloist

noun
  • A person who performs a solo. 

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