mamaw vs meemaw

mamaw

noun
  • One's grandmother, especially one's maternal grandmother. 

  • One's mother. 

meemaw

noun
  • Synonym of mamaw (“grandmother”) 

verb
  • To mouth words so that they can be heard over noise (or later so that they cannot be overheard), originally in the cotton industry of Lancashire. 

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