manna vs nugget

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 

nugget

noun
  • A tidbit of something valuable. 

  • A small piece of tasty food, a tidbit. 

  • A type of boot polish. 

  • A chicken nugget. 

  • An inexperienced, newly trained fighter pilot. 

  • A bud from the Cannabis sativa plant, especially one that is potent. 

  • A small, compact chunk or clump. 

  • A partial description gleaned from data mining. 

  • A person with no arms or legs; a basket case. 

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