bonanza vs premium

bonanza

noun
  • A rich mine or vein of silver or gold. 

  • The point at which two mother lodes intersect. 

  • Anything which is a great source of wealth or yields a large income or return. 

premium

noun
  • A prize or award. 

  • A bonus paid in addition to normal payments. 

  • The amount to be paid for an insurance policy. 

  • Something offered at a reduced price as an inducement to buy something else. 

  • An unusually high value. 

  • The amount by which a security's value exceeds its face value. 

adj
  • High-end; belonging to the market segment between mid-market and luxury. 

  • Superior in quality; higher in price or value. 

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