activate vs wind down

activate

verb
  • To render more reactive; excite. 

  • To organize or create a military unit or station. 

  • To bring a player back after an injury. 

  • To put a device, mechanism (alarm etc.) or system into action or motion; to trigger, to actuate, to set off, to enable. 

  • To render a substance radioactive. 

  • To hasten a chemical reaction, especially by heating. 

  • To remove the limitations of demoware by providing a license; to unlock. 

  • To render a molecule reactive, active, or effective in performing its function. 

  • To encourage development or induce increased activity; to stimulate. 

  • To aerate in order to aid decomposition of organic matter. 

wind down

verb
  • To relax; to get rid of stress; to destress. 

  • To slow, as if coming to an end; to become calmer or less busy. 

  • To unwind. 

  • To lower by winding, as with a crank or windlass. 

  • To shut down slowly (by degrees or in phases). 

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