bisect vs tranche

bisect

verb
  • To divide an angle, line segment, or other figure into two equal parts. 

  • To perform a binary search on files in source control in order to identify the specific change that introduced a bug etc. 

noun
  • A bisector, which divides into two equal parts. 

  • An envelope, card, or fragment thereof showing an affixed cut half of a regular issued stamp, over which one or more postal markings have been applied. Typically used in wartime when normal lower rate stamps may not be available. 

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