ballet vs masked ball

ballet

noun
  • The company of persons who perform this dance. 

  • A light part song, frequently with a fa-la-la chorus, common among Elizabethan and Italian Renaissance composers. 

  • A theatrical presentation of such dancing, usually with music, sometimes in the form of a story. 

  • A bearing in coats of arms representing one or more balls, called bezants, plates, etc., according to colour. 

  • A classical form of dance. 

  • Any intricate series of operations involving coordination between individuals. 

verb
  • To perform an action reminiscent of ballet dancing. 

masked ball

noun
  • A ball (formal dance) in which the dancers wear masks or fancy dress 

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