aerogenerator vs pinwheel

aerogenerator

noun
  • A generator powered by wind. 

pinwheel

noun
  • A firework which forms a kind of spinning wheel. 

  • An artificial flower with a stem, usually plastic, for children: the flower spins round in the wind, like a small paper windmill. 

  • Any food product consisting of layers (for example of pastry and sweet filling, or of bread and meat) rolled into a spiral, visually similar to a cinnamon roll. 

  • A cogged (toothed) gear. 

  • A pastry which resembles the artificial flowers above, with some filling or topping in the center. 

verb
  • To spin. 

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