shield vs turn on

shield

verb
  • To protect, to defend. 

  • to protect from the influence of 

  • To shelter; to protect oneself. 

noun
  • A large expanse of exposed stable Precambrian rock. 

  • A wide and relatively low-profiled volcano, usually composed entirely of lava flows. 

  • Parts at the front and back of a vehicle which are meant to absorb the impact of a collision 

  • A broad piece of defensive armor, held in hand, formerly in general use in war, for the protection of the body. 

  • One who protects or defends. 

  • A spot resembling, or having the form of a shield. 

  • A sign or symbol, usually containing numbers and sometimes letters, identifying a highway route. 

  • A framework used to protect workmen in making an adit under ground, and capable of being pushed along as excavation progresses. 

  • The escutcheon or field on which are placed the bearings in coats of arms. 

  • A field of energy that protects or defends. 

  • In lichens, a hardened cup or disk surrounded by a rim and containing the fructification, or asci. 

  • A police badge. 

turn on

verb
  • To violently rebel against; to suddenly attack. 

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

  • 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 sexually arouse. 

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