degrade vs restore

degrade

verb
  • To reduce in quality or purity. 

  • To reduce in altitude or magnitude, as hills and mountains; to wear down. 

  • To lower in value or social position. 

restore

verb
  • To bring back to good condition from a state of decay or ruin. 

  • To give in place of, or as restitution for. 

  • To recover (data, etc.) from a backup. 

  • To bring (a note) back to its original signification. 

  • To reestablish, or bring back into existence. 

  • To give or bring back (that which has been lost or taken); to bring back to the owner; to replace. 

noun
  • The act of recovering data or a system from a backup. 

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