grub vs viaticum

grub

noun
  • An insect at an immature stage of its life cycle. 

  • Food. 

  • A dirty person. 

  • A despicable person; a lowlife. 

verb
  • To scavenge or in some way scrounge, typically for food. 

  • To dig; to dig up by the roots; to root out by digging; often followed by up. 

viaticum

noun
  • The Eucharist, when given to a person who is dying or one in danger of death. 

  • Provisions, money, or other supplies given to someone setting off on a long journey. 

  • A portable altar. 

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