propeller vs screwdriver

propeller

noun
  • A mechanical device with evenly-shaped blades that turn on a shaft to push against air or water, especially one used to propel an aircraft or boat. 

  • One who, or that which, propels. 

  • A steamboat thus propelled; a screw steamer. 

  • A spinnerbait. 

screwdriver

noun
  • A hand tool or power tool which engages with the head of a screw and allows torque to be applied to turn the screw, thus driving it in or loosening it. 

  • A drink made of vodka and orange juice. 

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