commendation vs thanks

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. 

thanks

noun
  • An expression of gratitude. 

  • Grateful feelings or thoughts. 

intj
  • Used to express appreciation or gratitude. 

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