erratic vs supported

erratic

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

  • Anything that has erratic characteristics. 

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

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

supported

adj
  • Held in position, especially from below. 

  • Having supporters. 

  • Furnished with corroborating evidence. 

  • Helped or aided. 

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