dulia vs thanksgiving

dulia

noun
  • The veneration of saints, distinguished from latria, the worship of God. 

thanksgiving

noun
  • A public celebration in acknowledgement of divine favour. 

  • An expression of gratitude. 

  • A short prayer said at meals; grace, a benediction. 

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