don vs guru

don

noun
  • A university professor, particularly one at Oxford or Cambridge. 

  • An employee of a university residence who lives among the student residents. 

  • A mafia boss. 

  • Any man, bloke, dude. 

verb
  • To put on clothing; to dress (oneself) in an article of personal attire. 

guru

noun
  • An influential advisor or mentor. 

  • In Indian traditions,it means a knowlegable teacher who guides his shishya(disciple/lit. seeker of [of knowledge or truth]) 

  • A Hindu or Sikh spiritual teacher. 

verb
  • To act as a guru; to give wise advice 

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