fleabag vs z's

fleabag

noun
  • A bed or sleeping bag. 

  • An unkempt mammal. 

  • A place of shabby lodging, particularly a filthy hotel or run-down apartment. 

  • A mammal whom the speaker dislikes. 

z's

noun
  • Sleep. 

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