trial run vs whack

trial run

noun
  • An empirical test of the suitability or capability of a person or actor by letting him perform at least once. 

  • An empirical test of the suitability or effectiveness of a method or thing by running it at least once. 

whack

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. 

verb
  • To kill, bump off. 

  • To surpass; to better. 

  • To beat convincingly; to thrash. 

  • To hit, slap or strike. 

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

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