devotee vs mother superior

devotee

noun
  • A fanatical or zealous believer in a particular religion or god. 

  • An ardent enthusiast or admirer. 

  • Someone with an amputee fetish. 

mother superior

noun
  • A nun in charge of a priory or convent; either a prioress or an abbess. 

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