slum vs zoo

slum

noun
  • Inexpensive trinkets awarded as prizes in a carnival game. 

  • A dilapidated neighborhood where many people live in a state of poverty. 

  • Slumgullion; a meat-based stew. 

verb
  • To visit a neighborhood of a status below one's own. 

zoo

noun
  • A large and varied collection of something. 

  • A zoophile. 

  • A park where live animals are exhibited. 

  • The jungle. 

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

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