mami vs mater

mami

noun
  • mommy, mother 

  • attractive woman; momma 

  • a term of affection for a woman 

mater

noun
  • Mother. 

  • A meninx; the dura mater, arachnoid mater, or pia mater of the brain. 

  • Someone or something that mates. 

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