go one better vs outgallop

go one better

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

  • To take a bet and add another to it. 

outgallop

verb
  • To run faster than; to outdistance. 

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