jalousie vs roller blind

jalousie

noun
  • Upward sloping window slats which form a blind or shutter, allowing light and air in but excluding rain and direct sun. 

  • A pastry with the upper side sliced before final baking to resemble a wooden slatted blind. 

  • A component in a ventilation system. 

roller blind

noun
  • A blind for a window, usually of stiffened fabric, mounted on a pole and operated with a chain or spring mechanism. 

  • A destination indicator blind on buses and trains having two rollers, top and bottom, the blind can be rolled to display various destinations and route numbers through a small window. 

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