hieroglyphic vs memorial

hieroglyphic

adj
  • of, relating to, or written with this system of symbols 

  • difficult to decipher 

noun
  • Undecipherable handwriting or secret symbol. 

  • Any symbol used in this system; a hieroglyph. 

  • A writing system of ancient Egypt, Minoans, Maya and other civilizations, using pictorial symbols to represent individual sounds as a rebus 

memorial

adj
  • Contained in the memory. 

  • Serving as a remembrance of someone or something; commemorative. 

noun
  • Something, such as a monument, by which someone or something is remembered. 

  • A chronicle or memoir. 

  • A service of remembrance or commemoration. 

  • A statement of facts set out in the form of a petition to a person in authority, a court or tribunal, a government, etc. 

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