curtilage vs outdoors

curtilage

noun
  • The area immediately surrounding a house, especially dooryard areas and sometimes including closely associated buildings and structures. 

outdoors

noun
  • The environment outside of enclosed structures. 

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

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

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