ferule vs whop

ferule

verb
  • To punish with a ferule. 

noun
  • A ruler-shaped instrument, generally used to slap naughty children on the hand. 

whop

verb
  • To administer corporal punishment 

  • To throw or move (something) quickly, usually with an impact. 

noun
  • A blow or strike. 

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