balcony vs patio

balcony

noun
  • An accessible structure extending from a building, especially outside a window. 

  • An accessible structure overlooking a stage or the like. 

patio

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

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

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