come to blows vs fisticuff

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). 

fisticuff

verb

  • To engage in a physical fight. 

noun

  • A fistfight. 

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