banquet vs red letter day

banquet

noun
  • A large celebratory meal; a feast. 

  • A ceremonial dinner party for many people. 

verb
  • To participate in a banquet; to feast. 

  • To treat with a banquet or sumptuous entertainment of food; to feast. 

red letter day

noun
  • A day marked in red on calendars; a church feast day. 

  • A particularly significant day; a day of personal or sectarian celebration. 

How often have the words banquet and red letter day occurred in a corpus of books? (source: Google Ngram Viewer )