cooperative vs penthouse

cooperative

adj
  • Ready to work with another person or in a team; ready to cooperate. 

  • Involving cooperation between individuals or parties. 

  • Relating to a cooperative or cooperatives. 

noun
  • A type of company that is owned partially or wholly by its employees, customers or tenants. 

penthouse

noun
  • Any of the sloping roofs at the side of a real tennis court. 

  • An outhouse or other structure (especially one with a sloping roof) attached to the outside wall of a building, sometimes as protection from the weather. 

  • An apartment or suite found on an upper floor, or floors, of a tall building, especially one that is expensive or luxurious with panoramic views. Sometimes these are located just under "penthouse mechanical" floors. 

verb
  • To provide with a penthouse, shelter by means of a shed sloping from a wall, or anything similar. 

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