curtilage vs patio

curtilage

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

patio

noun
  • An inner courtyard typical of traditional houses in some regions of Spain. 

  • A paved outside area, adjoining a house, used for dining or recreation. 

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