nuts vs very keen on

nuts

noun
  • An unbeatable hand; the best poker hand available. 

adj
  • Insane, mad. 

  • Crazy, mad; unusually pleased or, alternatively, angered. 

  • Very fond of (on) someone. 

intj
  • Indicates annoyance, anger, or disappointment. 

  • Signifies rejection of a proposal or idea, as in forget it, no way, or nothing doing; often followed by to. 

very keen on

How often have the words nuts and very keen on occurred in a corpus of books? (source: Google Ngram Viewer )