pay dirt vs quandary

pay dirt

noun
  • A profitable area or period; success. 

  • Earth which contains profitable quantities of ore. 

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. 

How often have the words pay dirt and quandary occurred in a corpus of books? (source: Google Ngram Viewer )