anchoress vs anchoritess

anchoress

noun
  • A female anchorite. A woman who chooses to withdraw from the world to live a solitary life of prayer and contemplation. 

  • An anchorwoman. 

anchoritess

noun
  • A female anchorite; an anchoress. 

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