appreciate vs guerdon

appreciate

verb
  • To be grateful or thankful for. 

  • To increase in value. 

  • To view as valuable. 

  • To be fully conscious of; understand; be aware of; detect. 

guerdon

verb
  • To give such a reward to. 

noun
  • A reward, prize or recompense for a service; an accolade. 

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