overlap vs tranche

overlap

noun
  • The payment of a spouse's or other dependant's annuity benefits concurrently with the member's benefits, on death of the member during the guarantee period. 

  • Something that overlaps or is overlapped 

  • a situation in the game where an attacking line has more players in it than the defensive line coming to meet it. The attacking side may exploit the overlap by using their superior numbers to break the opposition's defensive line. If attackers outnumber defenders by more than one player this is often termed a two man overlap or three man overlap, etc. If the attacking side fails to break through usually due to poor execution, they are said to waste an overlap. 

verb
  • Of sets: to have some elements in common. 

  • To have an area, range, character or function in common. 

  • To have some similar nucleotide sequences. 

  • To extend over and partly cover something. 

tranche

noun
  • A pension scheme's or scheme member's benefits relating to distinct accrual periods with different rules. 

  • 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 slice, section or portion. 

verb
  • To divide into tranches. 

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