about-face vs backflip

about-face

noun
  • A reversal in direction; a reversal of attitude or opinion. 

  • An abrupt turn to face the opposite direction. 

verb
  • To turn 180 degrees to face the opposite direction. 

  • To change opinion or attitude drastically. 

backflip

noun
  • a total reversal in policy or opinion; a volte-face, a U-turn. 

  • An act of rotating one's body 360 degrees in the backward direction. 

verb
  • To perform a backflip (rotation of body). 

  • To completely reverse a policy or opinion; perform a U-turn. 

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