patronage vs vassal

patronage

verb
  • To be a regular customer or client of; to patronize 

  • To support by being a patron of. 

noun
  • The act or state of being a customer of some business. 

  • Customers collectively; clientele; business. 

  • A communication that indicates lack of respect by patronizing the recipient; condescension; disdain. 

  • The right of nomination to political office. 

  • Granting favours or giving contracts or making appointments to office in return for political support. 

  • The right of presentation to church or ecclesiastical benefice; advowson. 

  • Guardianship, as of a saint; tutelary care. 

  • The act of providing approval and support; backing; championship. 

vassal

verb
  • To subordinate to someone or something. 

  • To treat as a vassal or to reduce to the position of a vassal; to subject to control; to enslave. 

adj
  • Resembling a vassal; slavish; servile. 

noun
  • The grantee of a fief, a subordinate granted use of a superior's land and its income in exchange for vows of fidelity and homage and (typically) military service. 

  • Any subordinate bound by similar close ties. 

  • Any direct subordinate bound by such vows to a superior. 

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