derision vs ragging

derision

noun
  • Act of treating with disdain. 

  • Something to be derided; a laughing stock. 

ragging

noun
  • The act of one who rags or teases. 

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

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