big enchilada vs loss leader

big enchilada

noun
  • Some item of high value, especially a top prize or reward. 

  • A very important person, especially the highest-ranking individual in an organization. 

loss leader

noun
  • An item that is sold at or below cost in an effort to stimulate other profitable sales. 

How often have the words big enchilada and loss leader occurred in a corpus of books? (source: Google Ngram Viewer )