patio vs townhouse

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. 

townhouse

noun
  • A house in an urban setting. 

  • A row house or terraced house. 

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