lounge vs z's

lounge

noun
  • The act of someone who lounges; idle reclining. 

  • An establishment, similar to a bar, that serves alcohol and often plays background music or shows television. 

  • The living room or sitting room of a house. 

  • A large comfortable seat for two or three people or more, a sofa or couch; also called lounge chair. 

  • A waiting room in an office, airport etc. 

verb
  • To relax; to spend time lazily; to stand, sit, or recline, in an indolent manner. 

z's

noun
  • Sleep. 

How often have the words lounge and z's occurred in a corpus of books? (source: Google Ngram Viewer )