lair vs warren

lair

noun
  • A place inhabited by a wild animal, often a cave or a hole in the ground. 

  • A place inhabited by a criminal or criminals, a superhero or a supervillain; a refuge, retreat, haven or hideaway. 

  • A shed or shelter for domestic animals. 

  • A grave; a cemetery plot. 

  • A bog; a mire. 

  • A person who dresses in a showy but tasteless manner and behaves in a vulgar and conceited way; a show-off. 

  • A bed or resting place. 

verb
  • To mire. 

  • To become mired. 

  • To lay down. 

  • To bury. 

  • To rest; to dwell. 

warren

noun
  • The system of burrows where rabbits live. 

  • The right to maintain and hunt an area of small beasts, similar to a free warren, but with certain limitations, such as restricting the right to hunt on parts of the land held by freeholders. 

  • A mazelike place of passages and/or rooms in which it's easy to lose oneself; especially one that may be overcrowded. 

  • A place legally authorized for the keeping, breeding and hunting of beasts of warren, especially rabbits. 

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