disturb vs shut down

disturb

verb
  • to have a negative emotional impact; to cause emotional distress or confusion. 

  • to divert, redirect, or alter by disturbing. 

  • to confuse a quiet, constant state or a calm, continuous flow, in particular: thoughts, actions or liquids. 

shut down

verb
  • To emotionally withdraw into oneself as a defense mechanism; to block out external stressors. 

  • To pass (another vehicle), especially quickly. 

  • To close, terminate, or end. 

  • To turn off or stop. 

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