root cellar vs viand

root cellar

noun
  • A structure built underground or partially underground and used to store vegetables, fruits, and nuts or other foods. 

verb
  • To cellar (food) in a root cellar. 

viand

noun
  • An item of food. 

  • side dish; rice topping (An item of food eaten with rice.) 

  • A choice dish. 

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