Culdee vs cloisterer

Culdee

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

cloisterer

noun
  • One belonging to, or living in, a cloister; a recluse. 

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