approbation vs homage

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. 

homage

noun
  • In feudalism, the formal oath of a vassal to honor his or her lord's rights. 

  • A demonstration of respect, such as towards an individual after their retirement or death 

  • An artistic work imitating another in a flattering style. 

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