refuge vs shielding

refuge

noun
  • An expedient to secure protection or defence. 

  • A state of safety, protection or shelter. 

  • A refuge island. 

  • A place providing safety, protection or shelter. 

  • Something or someone turned to for safety or assistance; a recourse or resort. 

verb
  • To return to a place of shelter. 

shielding

noun
  • Action done by the person with the ball to protect the ball from the defender; the person concerned keeps his body between the ball and the defender. 

  • The situation, in NMR spectroscopy, in which a local magnetic field is weakened by the presence of neighbouring nuclei 

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