approbation vs compliment

approbation

noun
  • The act of approving; an assenting to the propriety of a thing with some degree of pleasure or satisfaction; approval, sanction, commendation or official recognition. 

compliment

noun
  • An expression of praise, congratulation, or respect. 

  • Complimentary language; courtesy, flattery. 

verb
  • To pay a compliment (to someone); to express a favourable opinion (of someone). 

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