Boeotian vs one fry short of a Happy Meal

Boeotian

adj
  • Stupid, foolish, dull-witted. 

  • Pertaining to Boeotia. 

noun
  • An inhabitant or a resident of Boeotia. 

  • A dull or ignorant person. 

name
  • A dialect of Ancient Greek spoken in Boeotia. 

one fry short of a Happy Meal

adj
  • stupid, retarded, slow 

  • mad, deranged, insane 

How often have the words Boeotian and one fry short of a Happy Meal occurred in a corpus of books? (source: Google Ngram Viewer )