deter vs obviate

deter

verb
  • To prevent something from happening. 

  • To persuade someone not to do something; to discourage. 

  • To distract someone from something. 

obviate

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

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

noun
  • Synonym of obviative 

adj
  • Synonym of obviative 

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