condominium vs townhouse

condominium

noun
  • An individual unit (such as an apartment) in such a complex. 

  • Joint sovereignty over a territory by two or more countries. 

  • The system of ownership by which such condominiums operate 

  • A region or territory under such rule. 

  • The legal tenure involved. 

townhouse

noun
  • A house in an urban setting. 

  • A row house or terraced house. 

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