congee vs vichyssoise

congee

noun
  • A type of thick rice porridge or soup, sometimes prepared with vegetables and/or meat. 

  • Leave, formal permission for some action, (originally and particularly) 

vichyssoise

noun
  • A thick, creamy soup made from potato, leeks, onions, and chicken stock, and normally served cold. 

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