hurtle vs step on it

hurtle

verb
  • To move rapidly, violently, or without control. 

  • To hurl or fling; to throw hard or violently. 

noun
  • A clattering sound. 

  • A fast movement in literal or figurative sense. 

step on it

verb
  • To act quickly. 

  • To drive fast; to step on the accelerator. 

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