entr'acte vs intermission

entr'acte

noun
  • Another performance, such as a piece of music or a dance, during this. 

  • An interval between two acts of a play or opera. 

intermission

noun
  • A break between two performances or sessions, such as at a concert, play, seminar, or religious assembly. 

How often have the words entr'acte and intermission occurred in a corpus of books? (source: Google Ngram Viewer )