flip-flop vs revert

flip-flop

verb
  • To alternate back and forth between directly opposite opinions, ideas, or decisions. 

noun
  • A return trip. 

  • A sandal consisting of a rubber sole fastened to the foot by a rubber thong fitting between the toes and around the sides of the foot. 

  • A bistable; an electronic switching circuit that has either two stable states (switching between them in response to a trigger) or a stable and an unstable state (switching from one to the other and back again in response to a trigger), and which is thereby capable of serving as one bit of memory. 

  • An instance of flip-flopping, of repeatedly changing one's stated opinion about a matter. 

  • A change of places; an inversion or swap. 

  • The sound of a regular footfall. 

  • A somersault. 

revert

verb
  • To take up again or return to a previous topic. 

  • Of an estate: To return to its former owner, or to his or her heirs, when a grant comes to an end. 

  • To return to a former practice, condition, belief, etc. 

  • To convert to Islam. 

  • To cause (a property or rights) to return to the previous owner. 

  • To reply (to correspondence, for example). 

  • To treat (a series, such as y = a + bx + cx² + ..., where one variable y is expressed in powers of a second variable x), so as to find the second variable x expressed in a series arranged in powers of y. 

  • To return to the possession of. 

  • To cause to return to a former condition. 

  • To throw back; to reflect; to reverberate. 

  • To return to an earlier or primitive type or state; to take on the traits or characters of an ancestral type. 

  • To change back, as from a soluble to an insoluble state or the reverse. 

noun
  • The act of reversion (of e.g. a database transaction or source control repository) to an earlier state. 

  • One who reverts to that religion which he had adhered to before having converted to another 

  • One who, or that which, reverts. 

  • The skateboard maneuver of rotating the board 180 degrees or more while the wheels remain on the ground. 

  • A convert to Islam. 

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