lunatic vs one fry short of a Happy Meal

lunatic

adj

  • Crazed, mad, insane, demented. 

noun

  • An insane person. 

one fry short of a Happy Meal

adj

  • mad, deranged, insane 

  • stupid, retarded, slow 

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