internal affairs vs zoo

internal affairs

noun
  • A division of a law enforcement agency investigating incidents and plausible suspicions of lawbreaking and professional misconduct attributed to officers on the force. 

zoo

noun
  • A zoophile. 

  • A park where live animals are exhibited. 

  • A large and varied collection of something. 

  • The jungle. 

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

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