interlude vs tranche

interlude

noun
  • A short piece put between the parts of a longer composition. 

  • An intervening episode, etc. 

  • An entertainment between the acts of a play. 

verb
  • To provide with an interlude. 

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