clemency vs punishment

clemency

noun
  • A pardon, commutation, or similar reduction, removal, or postponement of legal penalties by an executive officer of a state. 

  • The gentle or kind exercise of power; leniency, mercy; compassion in judging or punishing. 

punishment

noun
  • The act or process of punishing, imposing and/or applying a sanction. 

  • A penalty to punish wrongdoing, especially for crime. 

  • Any harsh treatment or experience; rough handling. 

  • A suffering by pain or loss imposed as retribution 

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