step on vs stomp

step on

verb
  • Used other than figuratively or idiomatically: see step, on. 

  • to adulterate a drug for the purpose of increasing its bulk, and therefore its profit; to dilute, cut. 

stomp

verb
  • To severely beat someone physically or figuratively. 

  • To trample heavily. 

  • To crush grapes with one's feet to make wine 

noun
  • The jazz music for this dance. 

  • A dance having a heavy, rhythmic step. 

  • A deliberate heavy footfall; a stamp. 

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