descend vs impact

descend

verb
  • To make an attack, or incursion, as if from a vantage ground; to come suddenly and with violence. 

  • To move toward the south, or to the southward. 

  • To fall in pitch; to pass from a higher to a lower tone. 

  • to proceed by generation or by transmission; to happen by inheritance. 

  • To go down upon or along; to pass from a higher to a lower part of 

  • to be derived (from) 

  • To pass from a higher to a lower place; to move downwards; to come or go down in any way, for example by falling, flowing, walking, climbing etc. 

  • To enter mentally; to retire. 

  • To come down, as from a source, original, or stock 

  • To come down to a lower, less fortunate, humbler, less virtuous, or worse, state or rank; to lower or abase oneself 

  • And on the suitors let thy wrath descend. 

  • To pass from the more general or important to the specific or less important matters to be considered. 

impact

verb
  • To collide or strike, the act of impinging. 

  • To stamp or impress onto something. 

  • 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. 

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