distress vs perturbation

distress

noun
  • An aversive state of stress to which a person cannot fully adapt. 

  • A cause of such discomfort. 

  • The thing taken by distraining; that which is seized to procure satisfaction. 

  • Physical or emotional discomfort, suffering, or alarm, particularly of a more acute nature. 

  • Serious danger. 

  • A seizing of property without legal process to force payment of a debt. 

verb
  • To treat a new object to give it an appearance of age. 

  • To retain someone’s property against the payment of a debt; to distrain. 

  • To cause strain or anxiety to someone. 

perturbation

noun
  • Agitation; the state of being perturbed 

  • Variation in an orbit due to the influence of external bodies 

  • A small change in a physical system, or more broadly any definable system (such as a biological or economic system) 

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