hex vs turn off

hex

verb
  • To cast a spell on (specifically an evil spell), to bewitch. 

noun
  • A spell (now rare but still found in compounds such as hex sign and hexcraft). 

  • A hexagonal space on a game board. 

  • An evil spell or curse. 

  • A witch. 

  • a hexagon-shaped item of rock climbing equipment intended to be wedged into a crack or other opening in the rock. 

turn off

verb
  • To repulse, disgust, or discourage (someone). 

  • To leave a road; to exit. 

  • To become deactivated; to become powered down. 

  • To power down, to switch off, to put out of operation, to deactivate (an appliance, light, mechanism, functionality etc.). 

  • To rotate a tap or valve so as to interrupt the outflow of liquid or gas. 

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