fief vs royalism

fief

noun
  • Land held of a superior, particularly on condition of homage, fealty, and personal service, especially military service. 

  • A territory, a domain, an area over which one exercises lordly control, particularly with regard to corporate or governmental bureaucracies. 

  • Synonym of estate: any land, when considered as a region over which the owner exercises lordly control. 

royalism

noun
  • Impassioned allegiance to or advocacy of the establishment, maintenance, and/or interests of a particular king, royal house, or kingly dynasty; sometimes extended to the same of a non-royal (i.e., grand ducal, imperial, or other) family or sovereign; often contrasted with monarchism. 

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