guarding vs reassurance

guarding

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

reassurance

noun
  • The act of confirming someone's opinion or impression. 

  • Reinsurance. 

  • The feeling of being reassured, of having confidence restored, of having apprehensions dispelled. 

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