about-face vs right-about

about-face

noun

  • An abrupt turn to face the opposite direction. 

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

verb

  • To turn 180 degrees to face the opposite direction. 

  • To change opinion or attitude drastically. 

right-about

noun

  • A 180-degree turn towards the right (especially of troops) 

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