ragging vs what for

ragging

noun
  • The act of one who rags or teases. 

  • An initiation in educational institutions (e.g. universities) usually involving harassment by upperclassmen. 

what for

noun
  • An unspecified punishment or rebuke 

adv
  • For what reason; why. 

  • For what purpose. 

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