slay vs whack

slay

verb
  • To kill; to murder. 

  • To defeat; to overcome (in a competition or contest). 

  • To amaze, stun, or otherwise incapacitate by excellence; to excel at something. 

  • To have sex with. 

  • To delight or overwhelm, especially with laughter. 

  • To eradicate or stamp out. 

whack

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). 

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 slay and whack occurred in a corpus of books? (source: Google Ngram Viewer )