falsification vs fudging

falsification

noun
  • the act of falsifying, or making false; a counterfeiting; the giving to a thing an appearance of something which it is not 

  • showing an item of charge in an account to be wrong 

  • knowingly false statement or wilful misrepresentation 

fudging

noun
  • The act of something being fudged, altered so as to hide a flaw or uncertainty. 

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