stir up vs whet

stir up

verb
  • To arouse or excite (passion or action). 

  • To move or disturb slightly; to make turbid. 

  • To mix (ingredients) by stirring. 

whet

verb
  • To stimulate or make more keen. 

  • To hone or rub on with some substance, as a piece of stone, for the purpose of sharpening – see whetstone. 

noun
  • The act of whetting something. 

  • That which whets or sharpens; especially, an appetizer. 

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