contentious vs litigious

contentious

adj
  • Marked by heated arguments or controversy. 

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

litigious

adj
  • Argumentative or combative. 

  • Inclined to engage in lawsuits. 

  • Of or relating to litigation. 

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