AAR vs debriefing

AAR

noun
  • after-action report; after-action review. 

  • Aircraft accident report. 

name
  • Association of American Railroads 

  • Axis2 ARchive file (extension .aar) 

  • All-American Rejects 

  • Air America Radio 

  • American Academy of Religion 

prep
  • At any rate. 

  • against all risks. 

debriefing

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

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

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