slalom vs vacillate

slalom

verb
  • To move in a slalom-like manner. 

  • To race in a slalom. 

noun
  • A race or competition wherein participants each perform the sport of slalom. 

  • A course used for the sport of slalom. 

  • The sport of skiing in a zigzag course through gates. (Often used attributively) 

  • Any similar activity on other vehicles, including canoes and water skis. 

vacillate

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

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

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