establish vs prevent

establish

verb
  • To prove and cause to be accepted as true; to establish a fact; to demonstrate. 

  • To form; to found; to institute; to set up in business. 

  • To appoint or adopt, as officers, laws, regulations, guidelines, etc.; to enact; to ordain. 

  • To make stable or firm; to confirm. 

prevent

verb
  • To stop (an outcome); to keep from (doing something). 

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