Cistercian vs abbot

Cistercian

noun
  • A member of a monastic order which follows the Benedictine rule and emphasizes silent contemplative prayer. 

adj
  • Of, pertaining to or characteristic of the Cistercian Order and its members. 

abbot

noun
  • The superior or head of an abbey or monastery. 

  • The pastor or administrator of an order, including minor and major orders starting with the minor order of porter. 

  • A layman who received the abbey's revenues, after the closing of the monasteries. 

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