adieu vs vale

adieu

intj

  • Said to wish a final farewell; goodbye. 

noun

  • A farewell, a goodbye; especially a fond farewell, or a lasting or permanent farewell. 

vale

intj

  • Farewell. 

noun

  • A valley. 

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