allotment vs tranche

allotment

noun
  • Something allotted; a share, part, or portion granted or distributed 

  • The allowance of a specific amount of money or other credit of a particular thing to a particular person. 

  • A plot of land rented from the council for growing fruit and vegetables. 

  • The act of allotting. 

tranche

noun
  • A slice, section or portion. 

  • 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. 

verb
  • To divide into tranches. 

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