developed vs primeval

developed

adj
  • Not primitive; not third-world. 

  • Mature. 

  • Containing man-made structures such as roads, sewers, electric lines, buildings, and so on. 

  • Having useful or necessary infrastructure. 

  • Processed and fixed; containing a visible negative (or positive for slide film) image 

  • Advanced, fully formed. 

primeval

adj
  • Primitive. 

  • Belonging to the first ages. 

  • Primary; original. 

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