intersect vs tranche

intersect

verb
  • To cut into or between; to cut or cross mutually; to divide into parts. 

  • Of two sets, to have at least one element in common. 

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