author vs developer

author

noun
  • The originator or creator of a work, especially of a literary composition. 

  • Someone who writes books for a living. 

verb
  • To create a work as its author. 

developer

noun
  • A person or entity engaged in the creation or improvement of certain classes of products. 

  • A reagent used to produce an ingrain color by its action upon some substance on the fiber. 

  • A film developer; a person who uses chemicals to create photographs from photograph negatives. 

  • A software developer; a person or company who creates or modifies computer software. 

  • A real estate developer; a person or company who prepares a parcel of land for sale, or creates structures on that land. 

  • A liquid used in the chemical processing of traditional photos. 

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