approbation vs congratulations

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. 

congratulations

intj
  • Expressing praise and approval, expressing approbation. 

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