genius vs yo-yo

genius

adj
  • Ingenious, brilliant, very clever, or original. 

noun
  • Inspiration, a mental leap, an extraordinary creative process. 

  • Someone possessing extraordinary intelligence or skill; especially somebody who has demonstrated this by a creative or original work in science, music, art etc. 

  • Extraordinary mental capacity. 

  • The tutelary deity or spirit of a place or person. 

yo-yo

verb
  • To vacillate; to move up and down. 

noun
  • A toy consisting of a spheroidal or cylindrical spindle having a circular groove in which string is wound; it is used by holding the string in the fingers and reeling the spindle up and down by movements of the wrist. 

  • A cloth rosette formed by gathering the outside edge of a circle of fabric in toward the centre using a running stitch. 

  • Someone who vacillates. 

  • A dogfighting maneuver involving the attacker temporarily exchanging altitude for airspeed, or vice versa, in order to rapidly catch up with the defender or to prevent an overshoot. 

  • A volatile market that moves up and down. 

  • A foolish, annoying or incompetent person. 

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