T-Day vs Thanksgiving

T-Day

noun
  • Thanksgiving Day; Turkey Day. 

Thanksgiving

name
  • An analogous celebration in other cultures, especially a harvest festival. 

  • Thanksgiving Day, celebrated on the second Monday of October in Canada, and on the fourth Thursday of November in the United States. 

  • The long weekend which includes Thanksgiving Day; Thanksgiving weekend. 

How often have the words T-Day and Thanksgiving occurred in a corpus of books? (source: Google Ngram Viewer )