slit vs tranche

slit

verb
  • To split into strips by lengthwise cuts. 

  • To cut a narrow opening. 

  • To cut; to sever; to divide. 

noun
  • A narrow cut or opening; a slot. 

  • The opening of the vagina. 

  • A woman, usually a sexually loose woman; a prostitute. 

adj
  • Having a cut narrow opening 

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