city vs outdoors

city

noun
  • A large settlement, bigger than a town; sometimes with a specific legal definition, depending on the place. 

  • A settlement granted special status by royal charter or letters patent; traditionally, a settlement with a cathedral regardless of size. 

  • A large amount of something (used after the noun). 

  • The central business district; downtown. 

outdoors

adv
  • Not inside a house or under covered structure; unprotected; in the open air. 

noun
  • The natural environment in the open air, countryside away from cities and buildings. 

  • The environment outside of enclosed structures. 

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