balcony vs townhouse

balcony

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

  • An accessible structure overlooking a stage or the like. 

townhouse

noun
  • A house in an urban setting. 

  • A row house or terraced house. 

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