mom vs progenitor

mom

noun
  • Mother. 

  • An adult female owner of a pet. 

verb
  • To care for in a motherly way. 

progenitor

noun
  • An ancestral form of a species. 

  • A forefather, any of a person's direct ancestors. 

  • A predecessor of something, especially if also a precursor or model. 

  • A founder. 

  • Someone who originates something. 

  • An individual from whom one or more people (dynasty, tribe, nation...) are descended. 

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