complaint vs confirmation

complaint

noun
  • In a civil action, the first pleading of the plaintiff setting out the facts on which the claim is based; 

  • However, court proceedings, such as a trial, cannot be instituted until an indictment or information has been handed down against the defendant. 

  • The purpose is to give notice to the adversary of the nature and basis of the claim asserted. 

  • The act of complaining. 

  • A grievance, problem, difficulty, or concern. 

  • In criminal law, the preliminary charge or accusation made by one person against another to the appropriate court or officer, usually a magistrate. 

  • A bodily disorder or disease; the symptom of such a disorder. 

confirmation

noun
  • A verification that something is true or has happened. 

  • An official indicator that things will happen as planned. 

  • A ceremony of sealing and conscious acknowledgement of the faith in many Christian churches, typically around the ages of 14 to 18; considered a sacrament in some churches, including Catholicism, but not in most Protestant churches. 

  • An act whereby something conditional or voidable is made sure and unavoidable, especially the possession of an estate. 

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