reject vs stiffen

reject

noun
  • A rejected takeoff. 

  • A rejected defective product in a production line. 

  • Something that is rejected. 

  • An unpopular person. 

verb
  • To refuse a romantic advance. 

  • To refuse to accept. 

  • To block a shot, especially if it sends the ball off the court. 

stiffen

verb
  • To make stiff. 

  • To become stiff. 

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