entr'acte vs smoko

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. 

smoko

noun
  • A cigarette break from work or military duty; a brief cessation of work to have a smoke, or (more generally) to take a small rest, snack etc. 

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