Nana vs meemaw

Nana

name
  • One's grandmother. 

  • A governess. 

  • A Japanese female given name from Japanese 

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 Nana and meemaw occurred in a corpus of books? (source: Google Ngram Viewer )