carry out vs nullify

carry out

verb
  • To hold while moving it out. 

  • To execute or perform; to put into operation; to do. 

  • To fulfill. 

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