commemoration vs obit

commemoration

noun
  • The specification of individual saints in the prayers for the dead. 

  • The great festival of the Oxford academic year, usually taking place on the third Wednesday after Trinity Sunday. 

  • That which serves the purpose of commemorating; a memorial. 

  • The act of commemorating; an observance or celebration to honor the memory of some person or event. 

obit

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

  • An obituary. 

  • A record of a person's death. 

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