rear end vs tush

rear end

noun
  • The buttocks. 

  • The back or hindmost part of anything, such as a car. 

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 rear end and tush occurred in a corpus of books? (source: Google Ngram Viewer )