gyro vs rotor

gyro

noun
  • An autogyro. 

  • A gyrocompass. 

  • Synonym of detangler. 

  • A gyroscope. 

  • A style of Greek sandwich commonly filled with grilled meat, tomato, onions, and tzatziki sauce. 

rotor

noun
  • A rotating part of a mechanical device; for example, in an electric motor, generator, alternator, or pump. 

  • The wing of a helicopter or other rotary-wing aircraft. 

  • A type of powerful horizontal-axis atmospheric vortex generated by the interaction of strong winds with mountainous terrain. 

  • A quantity having magnitude, direction, and position. 

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