despise vs look down on

despise

verb
  • To regard with contempt or scorn. 

  • To disregard or ignore. 

look down on

verb
  • To regard or treat as inferior. 

  • To view [people or events on Earth] from the vantage point of the afterlife (originally, Heaven) 

How often have the words despise and look down on occurred in a corpus of books? (source: Google Ngram Viewer )