announcement vs obit

announcement

noun
  • The content which is announced. 

  • An act of announcing, or giving notice. 

  • That which conveys what is announced. 

obit

noun
  • An obituary. 

  • A mass or other service held for the soul of a dead person. 

  • A record of a person's death. 

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