Culdee vs postulant

Culdee

noun
  • One of a class of anchorites who lived in various parts of Scotland, Ireland, and Wales. 

postulant

noun
  • A person who submits a petition for something; a petitioner. 

  • A person seeking admission to a religious order. 

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