demur vs vacillate

demur

verb
  • To scruple or object; to take exception; to oppose; to balk 

  • To interpose a demurrer. 

  • To delay; to pause; to suspend proceedings or judgment in view of a doubt or difficulty; to hesitate; to put off the determination or conclusion of an affair. 

noun
  • An act of hesitation as to proceeding; a scruple; also, a suspension of action or decision; a pause, a stop. 

vacillate

verb
  • To swing indecisively from one course of action or opinion to another. 

  • To sway unsteadily from one side to the other; oscillate. 

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