commendation vs recognition

commendation

noun
  • That which is the ground of approbation or praise. 

  • The act of commending; praise; favorable representation in words; recommendation. 

  • A message of affection or respect; compliments; greeting. 

  • An award or recognition for performance; a medal. 

recognition

noun
  • Honour, favourable note, or attention. 

  • Acceptance as valid or true. 

  • The act of recognizing or the condition of being recognized (matching a current observation with a memory of a prior observation of the same entity). 

  • A return of the feu to the superior. 

  • Official acceptance of the status of a new government by that of another country. 

  • The propriety consisting for antibodies to bind to some specific antigens and not to others. 

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