guarding vs preservation

guarding

noun
  • Tensing of the muscles, especially of the abdomen, in order to minimise the movement and agitation to the internal inflamed organs. 

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. 

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