premium vs tranche

premium

noun
  • The amount to be paid for an insurance policy. 

  • A bonus paid in addition to normal payments. 

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

  • An unusually high value. 

  • A prize or award. 

  • 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. 

tranche

noun
  • A distinct subdivision of a single policyholder's benefits, typically relating to separate premium increments. 

  • One of a set of classes or risk maturities that compose a multiple-class security, such as a CMO or REMIC; a class of bonds. Collateralized mortgage obligations are structured with several tranches of bonds that have various maturities. 

  • A pension scheme's or scheme member's benefits relating to distinct accrual periods with different rules. 

  • A slice, section or portion. 

verb
  • To divide into tranches. 

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