cracky vs not right in the head

cracky

adj

  • crazy, mad 

  • Having lots of cracks. 

  • Resembling or characterised by crack cocaine; addicted to crack 

noun

  • Democrat. 

not right in the head

adj

  • crazy, insane 

How often have the words cracky and not right in the head occurred in a corpus of books? (source: Google Ngram Viewer )