mami vs maternity

mami

noun
  • mommy, mother 

  • attractive woman; momma 

  • a term of affection for a woman 

maternity

noun
  • The state of being a mother; motherhood. 

  • The state of being pregnant; pregnancy. 

  • A ward or department in a hospital in which babies are born. 

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