dictate vs impact

dictate

verb
  • To determine or decisively affect. 

  • To order, command, control. 

  • To speak in order for someone to write down the words. 

noun
  • An order or command. 

impact

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

  • To stamp or impress onto something. 

  • To collide or strike, the act of impinging. 

  • 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. 

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