mad as a fish vs nut-bar

mad as a fish

adj

  • Demented, crazy. 

nut-bar

adj

  • Crazy, mad. 

noun

  • A bar or shaft with an aperture for a bolt or threaded rod to attach to or pass through. 

  • An insane person, a crazy person, a madwoman or madman. 

How often have the words mad as a fish and nut-bar occurred in a corpus of books? (source: Google Ngram Viewer )