remembrance vs souvenir

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. 

souvenir

noun
  • An item of sentimental value, that is given or kept to remember an event or location. 

verb
  • To take (something) as a souvenir, especially illicitly, for example during wartime. 

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