back end vs tush

back end

noun
  • The rear, back, or unseen portion (of something). 

  • The processing of spent fuel from a nuclear reactor into reusable materials. 

  • That part of a hardware or software system that is farthest from the user; the internals rather than the user interface. 

  • The latter end of any given time, especially the latter part of the year; autumn; late autumn. 

  • Money paid on a contingent deferred basis, for example, as a proportion of the profits or revenue of a work. 

tush

noun
  • The buttocks. 

  • A tusk. 

  • Nonsense; tosh. 

  • A small tusk sometimes found on the female Indian elephant. 

intj
  • An exclamation of contempt or rebuke. 

verb
  • To express contempt; rebuke. 

  • To pull or drag a heavy object such as a tree or log. 

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