faith vs fealty

faith

noun
  • An obligation of loyalty or fidelity and the observance of such an obligation. 

  • A conviction about abstractions, ideas, or beliefs, without empirical evidence, experience, or observation. 

  • A religious or spiritual belief system. 

  • A trust or confidence in the intentions or abilities of a person, object, or ideal from prior empirical evidence. 

fealty

noun
  • The oath by which this obligation was assumed. 

  • Fidelity to one's lord or master; the feudal obligation by which the tenant or vassal was bound to be faithful to his lord. 

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