backroom vs zoo

backroom

noun
  • A room near the rear of a premises, especially one that is only accessible to a privileged few and can be used as an inconspicuous meeting place. 

adj
  • Characterized by secrecy or anonymity. 

  • Of, relating to, or happening in a backroom. 

zoo

noun
  • Any place that is wild, crowded, or chaotic. 

  • A zoophile. 

  • A park where live animals are exhibited. 

  • A large and varied collection of something. 

  • The jungle. 

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