dog's breakfast vs potlatch

dog's breakfast

noun
  • Used other than figuratively or idiomatically: see dog, breakfast. 

  • An unappealing mixture; a disorderly situation; a mess. 

potlatch

noun
  • A communal meal to which guests bring dishes to share; a potluck. 

  • A ceremony amongst certain indigenous peoples of the Pacific Northwest in which gifts are bestowed upon guests and personal property is destroyed in a show of generosity and wealth. 

verb
  • To carry out or take part in a potlatch ceremony. 

  • To give; especially, to give as a gift during a potlatch ceremony. 

How often have the words dog's breakfast and potlatch occurred in a corpus of books? (source: Google Ngram Viewer )