few cards shy of a full deck vs insaniac

few cards shy of a full deck

adj

  • mentally deranged; demented; insane. 

insaniac

adj

  • Insane and maniacal. 

noun

  • One who is insane and maniacal. 

How often have the words few cards shy of a full deck and insaniac occurred in a corpus of books? (source: Google Ngram Viewer )