buy into vs refuse

buy into

verb
  • To believe; to accept a craze or fad as valid. 

  • To buy stocks or shares of (a business). 

refuse

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

  • To melt again. 

  • To decline (a request or demand). 

  • 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 buy into and refuse occurred in a corpus of books? (source: Google Ngram Viewer )