hieroglyphic vs pronunciation

hieroglyphic

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

  • Undecipherable handwriting or secret symbol. 

  • Any symbol used in this system; a hieroglyph. 

adj
  • difficult to decipher 

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

pronunciation

noun
  • The way in which the words of a language are made to sound when speaking. 

  • The formal or informal way in which a word is made to sound when spoken. 

  • The act of pronouncing or uttering a vocable. 

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