pinwheel vs turn over

pinwheel

verb
  • To spin. 

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

  • A firework which forms a kind of spinning wheel. 

  • 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. 

turn over

verb
  • To flip over; to rotate uppermost to bottom. 

  • To cause extensive disturbance or disruption to (a room, storage place, etc.), e.g. while searching for an item, or ransacking a property. 

  • Used other than figuratively or idiomatically: see turn, over. 

  • To generate (a certain amount of money from sales). 

  • To spin the crankshaft of an internal combustion engine using the starter or hand crank in an attempt to make it run. 

  • To mull, ponder 

  • To produce, complete, or cycle through. 

  • To transfer. 

  • To give up control (of the ball and thus the ability to score). 

  • To relinquish; give back. 

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