turn off vs unstop

turn off

verb
  • To become deactivated; to become powered down. 

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

  • To leave a road; to exit. 

  • 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. 

unstop

verb
  • To remove a stoppage; to clear a blockage. 

  • To draw out the stops of (an organ). 

  • To unplug or uncork a container. 

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