father superior vs pastor

father superior

noun
  • a friar or monk in charge of a monastery, priory or convent; an abbot or a prior 

pastor

noun
  • A minister or priest in a church. 

  • Someone with spiritual authority over a group of people 

  • A bird, the rosy starling. 

  • The main priest serving a parish. 

verb
  • To serve a congregation as pastor 

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