helter-skelter vs irritation

helter-skelter

noun
  • Confusion or turmoil. 

  • A helical fairground slide. 

adj
  • Carelessly hurried and confused. 

adv
  • In confused, disorderly haste. 

irritation

noun
  • The state of being irritated 

  • A things or person that annoys 

  • A condition of morbid excitability or oversensitiveness of an organ or part of the body; a state in which the application of ordinary stimuli produces pain or excessive or vitiated action. 

  • The act of irritating or annoying 

  • a state of inflammation or painful reaction to allergy or cell-lining damage. 

How often have the words helter-skelter and irritation occurred in a corpus of books? (source: Google Ngram Viewer )