commendation vs kind regards

commendation

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

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

  • That which is the ground of approbation or praise. 

  • An award or recognition for performance; a medal. 

kind regards

noun
  • Used as a polite closing of a letter 

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