commendation vs encomium

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. 

encomium

noun
  • Warm praise, especially a formal expression of such praise; a tribute. 

  • The eighth exercise in the progymnasmata series. 

  • A method within rhetorical pedagogy. 

  • A general category of oratory. 

  • A genre of literature that included five elements: prologue, birth and upbringing, acts of the person's life, comparisons used to praise the subject, and an epilogue. 

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