coronate vs overlord

coronate

verb
  • To crown (a sovereign). 

adj
  • Having a crest or a crownlike appendage. 

  • Having the coronal feathers lengthened or otherwise distinguished. 

  • Having or wearing a crown; crowned. 

  • Girt about the spire with a row of tubercles or spines. 

overlord

verb
  • To rule over; to domineer. 

noun
  • A ruler of other rulers. 

  • A feudal lord directly owed rent or personal service by a tenant of subinfeudated land, a tenant's liege lord. 

  • Anyone with overarching power or authority in a given domain. 

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