debriefing vs interrogation

debriefing

noun
  • The act of debriefing, or the state of being debriefed. 

  • The report of a mission or project, or the information so obtained. 

interrogation

noun
  • The act of interrogating or questioning; examination by questions; inquiry. 

  • A question put; an inquiry. 

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