contentious vs martial

contentious

adj
  • Marked by heated arguments or controversy. 

  • Given to struggling with others out of jealousy or discord. 

martial

adj
  • Of, relating to, or suggestive of war; warlike. 

  • Connected with or relating to armed forces or the profession of arms or military life. 

  • Characteristic of or befitting a warrior; having a military bearing; soldierly. 

How often have the words contentious and martial occurred in a corpus of books? (source: Google Ngram Viewer )