voices off vs whist

voices off

phrase
  • be quiet; silence! 

whist

noun
  • Any of several four-player card games, similar to bridge. 

  • A session of playing this card game. 

adj
  • Silent, hushed. 

verb
  • To hush, shush, or whisht; to still. 

  • To become silent. 

How often have the words voices off and whist occurred in a corpus of books? (source: Google Ngram Viewer )