partition vs tranche

partition

verb
  • To divide something into parts, sections or shares. 

  • To divide a region or country into two or more territories with separate political status. 

  • To separate or divide a room by a partition (ex. a wall), often use with off. 

noun
  • A vertical structure that divides a room. 

  • An approach to division in which one asks what the size of each part is, rather than (as in quotition) how many parts there are. 

  • A musical score. 

  • An action which divides a thing into parts, or separates one thing from another. 

  • A part of something that has been divided. 

  • A part divided off by walls; an apartment; a compartment. 

  • That which divides or separates; that by which different things, or distinct parts of the same thing, are separated; boundary; dividing line or space. 

  • The severance of common or undivided interests, particularly in real estate. It may be effected by consent of parties, or by compulsion of law. 

  • The division of a territory into two or more autonomous ones. 

  • A division of a database or one of its constituting elements such as tables into separate independent parts. 

  • A section of a hard disk separately formatted. 

  • A collection of non-empty, disjoint subsets of a set whose union is the set itself (i.e. all elements of the set are contained in exactly one of the subsets). 

tranche

verb
  • To divide into tranches. 

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. 

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