joking vs ragging

joking

noun
  • The act of telling or engaging in jokes. 

verb
  • Kidding, trying to fool. 

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 joking and ragging occurred in a corpus of books? (source: Google Ngram Viewer )