thrash vs whack

thrash

verb
  • To beat mercilessly. 

  • To defeat utterly. 

  • To extensively test a software system, giving a program various inputs and observing the behavior and outputs that result. 

  • In computer architecture, to cause or undergo poor performance of a virtual memory (or paging) system. 

  • To move about wildly or violently; to flail; to labour. 

  • To thresh. 

noun
  • A beat or blow; the sound of beating. 

  • thrash metal 

whack

verb
  • To beat convincingly; to thrash. 

  • To kill, bump off. 

  • To surpass; to better. 

  • To hit, slap or strike. 

  • To share or parcel out (often with up). 

noun
  • An attempt, a chance, a turn, a go, originally an attempt to beat someone or something. 

  • The sound of a heavy strike. 

  • The strike itself. 

  • The backslash, ⟨ \ ⟩. 

  • The stroke itself, regardless of its successful impact. 

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