look down on vs refuse

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) 

refuse

verb
  • To decline (a request or demand). 

  • To decline a request or demand, forbear; to withhold permission. 

  • To melt again. 

  • To throw back, or cause to keep back (as the centre, a wing, or a flank), out of the regular alignment when troops are about to engage the enemy. 

adj
  • Discarded, rejected. 

noun
  • Collectively, items or material that have been discarded; rubbish, garbage. 

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