dumbnut vs muggins

dumbnut

noun
  • A stupid person 

muggins

noun
  • A fool or idiot (especially as an ironic way of referring to oneself). 

  • The act of stealing another player's points because they either mispegged or counted up incorrectly. 

  • A game of dominoes in which the object is to make the sum of the two ends of the line some multiple of five. 

  • A card game based on building in suits or matching exposed cards, the object being to get rid of one's cards. 

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