commemoration vs remembrance

commemoration

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

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

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

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

remembrance

noun
  • That which serves to keep in or bring to mind; a memento, a memorial, a souvenir, a token; a memorandum or note of something to be remembered. 

  • The act of remembering; a holding in mind, or bringing to mind; recollection. 

  • Something remembered; a person or thing kept in memory. 

  • The power of remembering; the reach of personal knowledge; the period over which one's memory extends. 

  • The state of being remembered, or held in mind; memory, recollection. 

verb
  • To remember; to recall to mind. 

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