come to blows vs do battle

come to blows

verb
  • To fight; to initiate physical conflict, especially subsequent to escalating tension or antagonism. 

  • To degrade into a fight or physical conflict (in reference to an argument or to a situation of tension or antagonism). 

do battle

verb
  • To engage in a fight; to battle. 

How often have the words come to blows and do battle occurred in a corpus of books? (source: Google Ngram Viewer )