found vs nullify

found

verb
  • To form by melting a metal and pouring it into a mould; to cast. 

  • To melt, especially of metal in an industrial setting. 

  • To begin building. 

  • To start (an institution or organization). 

noun
  • A thin, single-cut file for comb-makers. 

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