backup vs discouragement

backup

noun
  • reinforcements 

  • A copy of a file or record, stored separately from the original, that can be used to recover the original if it is destroyed or damaged. 

  • A reserve or substitute. 

  • An accumulation of material caused by a (partial) obstruction or (complete) blockage of the flow or movement of the material, or an accumulation of material that causes an overflow due to the flow being greater than the maximum possible flow. 

adj
  • Supporting, reinforcing; (music) of or related to accompaniment 

  • Standby, reserve or extra. 

  • That is intended as a backup. 

discouragement

noun
  • Anything that discourages. 

  • The act of discouraging. 

  • The loss of confidence or enthusiasm. 

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