anchoress vs marabout

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. 

marabout

noun
  • The tomb or shrine of such a person. 

  • A Muslim holy man or mystic, especially in parts of North Africa. 

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