hieroglyph vs logograph

hieroglyph

noun
  • Any obscure or baffling symbol. 

  • An element of an ideographic (hieroglyphic) writing system. 

verb
  • To represent by hieroglyphs. 

logograph

noun
  • a character or symbol that represents a word or phrase. 

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