hieroglyphic vs penning

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 

penning

noun
  • Writing; literary composition. 

  • An old currency unit, the Swedish penning. 

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