combat vs rough-and-tumble

combat

noun
  • A battle, a fight (often one in which weapons are used). 

  • a struggle for victory 

verb
  • To fight; to struggle against. 

  • To fight (with); to struggle for victory (against). 

rough-and-tumble

noun
  • Rough activity; fighting or brawling; a fight. 

  • An environment of rough activity 

  • A person who characteristically engages in such activity 

adj
  • active, vigorous and rough, with the possibility of harm 

  • highly competitive 

verb
  • Engage in rough-and-tumble activity 

How often have the words combat and rough-and-tumble occurred in a corpus of books? (source: Google Ngram Viewer )