guerdon vs lagniappe

guerdon

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

verb
  • To give such a reward to. 

lagniappe

noun
  • An extra or unexpected gift or benefit, such as that given to customers when they purchase something. 

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