apportionment vs tranche

apportionment

noun
  • The allocation of direct taxation according to the population of the various states. 

  • The act of apportioning or the state of being apportioned. 

  • The distribution of members of the House of Representatives according to the population of the various states. 

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 apportionment and tranche occurred in a corpus of books? (source: Google Ngram Viewer )