mither vs momma

mither

noun
  • mother 

verb
  • To pester or irritate someone. 

  • To make an unnecessary fuss, moan, bother. 

momma

noun
  • mother 

  • One's wife or girlfriend. 

  • A voluptuous woman. 

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