dull vs turn on

dull

verb
  • To soften, moderate or blunt; to make dull, stupid, or sluggish; to stupefy. 

  • To render dull; to remove or blunt an edge or something that was sharp. 

  • To lose a sharp edge; to become dull. 

  • To render dim or obscure; to sully; to tarnish. 

adj
  • Not bright or intelligent; stupid; having slow understanding. 

  • Insensible; unfeeling. 

  • Not intense; felt indistinctly or only slightly. 

  • Sluggish, listless. 

  • Boring; not exciting or interesting. 

  • Not shiny; having a matte finish or no particular luster or brightness. 

  • Lacking the ability to cut easily; not sharp. 

  • Cloudy, overcast. 

  • Heavy; lifeless; inert. 

  • Not clear, muffled. 

turn on

verb
  • To fill with enthusiasm; to intoxicate, give pleasure to ( + to an object of interest or excitement). 

  • To aim at. 

  • To depend upon; to pivot around, to have as a central subject. 

  • To power up, to put into operation, to start, to activate (an appliance, light, mechanism, functionality etc.). 

  • To start operating; to power up, to become on. 

  • To take drugs. 

  • To cause to take up drugs, especially hallucinogens. 

  • To set a flow of fluid or gas running by rotating a tap or valve. 

  • To violently rebel against; to suddenly attack. 

  • To sexually arouse. 

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