downtime vs entr'acte

downtime

noun
  • A period of time set aside for rest and relaxation; leisure time. 

  • The amount of time lost due to forces beyond one's control, as with a computer crash. 

entr'acte

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

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

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