quandary vs sixty-four dollar question

quandary

noun
  • A state of not knowing what to decide; a state of difficulty or perplexity; a state of uncertainty, hesitation or puzzlement. 

  • A dilemma, a difficult decision or choice. 

sixty-four dollar question

How often have the words quandary and sixty-four dollar question occurred in a corpus of books? (source: Google Ngram Viewer )