memorization vs pelmanism

memorization

noun
  • The act of committing something to memory or memorizing. 

pelmanism

noun
  • A system of training to improve the memory. 

  • A memory card game in which a pack of cards is spread out face-down and players try to turn up pairs with the same symbol. 

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