callback vs recovery

callback

noun
  • The return of a situation to a previous position or state. 

  • A joke which references an earlier joke in the same routine. 

  • A follow-up audition in casting. 

  • A function pointer passed as an argument to another function. 

  • A return telephone or radio call; especially one made automatically to authenticate a logon to a computer network. 

  • A form of audience participation in which the audience shout lines in response to the dialog of a film. 

  • A product recall because of a defect or safety concern. 

recovery

noun
  • The act or process of regaining or repossession of something lost. 

  • The recovery of debt. 

  • The act of regaining the position of guard after making an attack, in fencing, sparring, etc. 

  • A verdict giving somebody the right to recover debts or costs. 

  • The extraction of an ore from a mine, or of a metal from an ore 

  • The ability to recover or regain health. 

  • A return to normal health. 

  • Renewed growth after a slump. 

  • The act of regaining the natural position after curtseying. 

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