precursive vs preexistent

precursive

adj
  • Preceding; introductory; precursory. 

  • Being a style of handwriting that can later be developed into cursive. 

preexistent

adj
  • Preceding existence. 

  • Existing previously. 

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