amble vs step on it

amble

verb
  • To stroll or walk slowly and leisurely. 

  • Of a quadruped: to move along by using both legs on one side, and then the other. 

noun
  • An easy gait, especially that of a horse. 

  • An unhurried leisurely walk or stroll. 

step on it

verb
  • To act quickly. 

  • To drive fast; to step on the accelerator. 

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