go one better vs outstep

go one better

verb
  • To outdo somebody; to do something that surpasses what came before. 

  • To take a bet and add another to it. 

outstep

verb
  • To step or go beyond; exceed; overstep. 

How often have the words go one better and outstep occurred in a corpus of books? (source: Google Ngram Viewer )