amp up vs whip up

amp up

verb
  • To excite; to arouse 

  • To amplify; to increase the power, interest, intensity, volume, etc. of (something). 

whip up

verb
  • To arouse or excite. 

  • To lift or snatch up suddenly. 

  • To produce (something) quickly, especially food. 

  • To beat (stir) (a liquid) quickly so to introduce air and form foam. 

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