approval vs homage

approval

noun
  • An expression of favorable acceptance and encouragement; a compliment that also condones. 

  • Something mailed by a seller to a collector to match their stated interests; the collector can approve of or return the item. 

  • An expression granting permission; an indication of agreement with a proposal; an acknowledgement that a person, thing, or event meets requirements. 

homage

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

  • An artistic work imitating another in a flattering style. 

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

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