author vs parent

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. 

parent

noun
  • The source or origin of something. 

  • A surrogate parent 

  • An organism from which a plant or animal is immediately biologically descended. 

  • A parent company. 

  • One of the two persons from whom one is immediately biologically descended; a mother or father. 

  • The object from which a child or derived object is descended; a node superior to another node. 

  • A person who acts as a parent in rearing a child; a step-parent or adoptive parent. 

  • The nuclide that decays into a daughter nuclide. 

  • A third person who has provided DNA samples in an IVF procedure in order to alter faulty genetic material 

  • Sponsor, supporter, owner, protector. 

verb
  • To act as parent, to raise or rear. 

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