impede vs shut out

impede

verb
  • To get in the way of; to hinder. 

shut out

verb
  • To refuse to be open and vulnerable toward. 

  • To prevent from scoring; to perform a shutout. 

  • To hide from sight. 

  • To prevent from entering; to block or exclude. 

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