crazy vs erratic

crazy

noun
  • Eccentric behaviour; lunacy; craziness. 

  • An insane or eccentric person; a crackpot. 

adv
  • Very, extremely. 

adj
  • Out of control. 

  • Of unsound mind; insane; demented. 

  • In love; experiencing romantic feelings. 

  • Very excited or enthusiastic. 

  • Very unexpected; wildly surprising. 

erratic

noun
  • Anything that has erratic characteristics. 

  • A rock moved from one location to another, usually by a glacier. 

adj
  • Deviating from normal opinions or actions; eccentric; odd. 

  • Unsteady, random; prone to unexpected changes; not consistent. 

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