accomplish vs nullify

accomplish

verb
  • To finish successfully. 

  • to fill out a form. 

  • To execute fully; to fulfill; to complete successfully. 

  • To complete, as time or distance. 

nullify

verb
  • To prevent from happening. 

  • To make of no use or value; to cancel out. 

  • To make legally invalid. 

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