problem vs recovery

problem

noun
  • A set of moves required to complete a climb. 

  • A difficulty that has to be resolved or dealt with. 

  • A puzzling circumstance. 

  • A question to be answered, schoolwork exercise. 

  • Objection. 

  • Difficulty in accepting or understanding or refusal to accept or understand. 

adj
  • Causing a problem; problematic; troublesome. 

  • Difficult to train or guide; unruly. 

recovery

noun
  • The act of regaining the natural position after curtseying. 

  • 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. 

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

  • A return to normal health. 

  • Renewed growth after a slump. 

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