ballerina vs entertainer

ballerina

noun
  • A male ballet dancer; Synonym of ballerino 

  • A ballet flat shoe. 

  • A female ballet dancer. 

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. 

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