defendant vs plaintiff

defendant

noun
  • In criminal proceedings, the accused. 

  • In civil proceedings, the party responding to the complaint; one who is sued and called upon to make satisfaction for a wrong complained of by another. 

adj
  • Serving, or suitable, for defense; defensive, defending. 

plaintiff

noun
  • A party bringing a suit in civil law against a defendant; accuser. 

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