excel vs go one better

excel

verb
  • To surpass someone or something; to be better or do better than someone or something. 

  • To be much better than others. 

go one better

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

  • To take a bet and add another to it. 

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