preservation vs recasting

preservation

noun
  • The act of preserving; care to preserve; act of keeping from destruction, decay or any ill. 

  • The state of being preserved, how something has survived. 

recasting

noun
  • The casting of something into a different form; a transformation. 

  • The adjustment of a loan that would otherwise be defaulted. 

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