keepsake vs rememoration

keepsake

noun
  • Some object given by a person and retained in memory of something or someone; something kept for sentimental or nostalgic reasons. 

  • Specifically, a type of literary album popular in the nineteenth-century, containing scraps of poetry and prose, and engravings. 

rememoration

noun
  • Recall by means of the memory; remembrance. 

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