gratification vs manna

gratification

noun
  • A gratuity; a reward. 

  • The act of gratifying or pleasing, either the mind, or the appetite or taste. 

  • A feeling of pleasure; satisfaction. 

manna

noun
  • Any boon which comes into one's hands by good luck. 

  • Food miraculously produced for the Israelites in the desert in the book of Exodus. 

  • The sugary sap of the manna gum tree which oozes out from holes drilled by insects and falls to the ground around the tree.http://www.museum.vic.gov.au/forest/plants/gum.html 

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