litigate vs oppose

litigate

verb
  • To dispute; to fight over. 

  • To go to law; to carry on a lawsuit. 

  • To contest in law. 

oppose

verb
  • To attempt to stop the progression of; to resist or antagonize by physical means, or by arguments, etc.; to contend against. 

  • To object to. 

  • To place in front of, or over against; to set opposite; to exhibit. 

  • To present or set up in opposition; to pose. 

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