impact vs refine

impact

verb
  • To stamp or impress onto something. 

  • To collide or strike, the act of impinging. 

  • To significantly or strongly influence or affect; to have an impact on. 

  • To compress; to compact; to press into something or pack together. 

noun
  • A significant or strong influence or effect. 

  • A forced impinging. 

  • The striking of one body against another; collision. 

  • The force or energy of a collision of two objects. 

refine

verb
  • To make nice or subtle. 

  • To improve in accuracy, delicacy, or excellence. 

  • To become pure; to be cleared of impure matter. 

  • To purify of coarseness, vulgarity, inelegance, etc.; to polish. 

  • To purify; reduce to a fine, unmixed, or pure state; to free from impurities. 

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