obviate vs shut out

obviate

verb
  • To avoid (a future problem or difficult situation). 

  • To anticipate and prevent or bypass (something which would otherwise have been necessary or required). 

noun
  • Synonym of obviative 

adj
  • Synonym of obviative 

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 obviate and shut out occurred in a corpus of books? (source: Google Ngram Viewer )