entr'acte vs moratorium

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. 

moratorium

noun
  • An authorization to a debtor, permitting temporary suspension of payments. 

  • A suspension of an ongoing activity. 

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