Pa vs pa

Pa

noun
  • A short form of grandpa; grandfather. 

  • Father, dad, papa. 

pa

noun
  • Grandpa, grandfather. 

  • Any Maori village or settlement; a kainga. 

  • A fortified Maori settlement, especially of pre-European times. 

  • Father, papa. 

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