leading lady vs soloist

leading lady

noun
  • A woman who does or can play the lead role in a movie, play or other production; a woman who frequently plays such roles. 

  • The type of conventionally beautiful and approachable woman who is perceived as being capable of playing female lead roles in movies or other productions. 

soloist

noun
  • A person who performs a solo. 

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