laird vs viscount

laird

noun
  • A feudal lord in Scottish contexts. 

  • An aristocrat, particularly in Scottish contexts and in reference to the chiefs of the Scottish clans. 

  • A landowner, particularly in Scottish contexts. 

verb
  • Chiefly as laird it over: to behave like a laird, particularly to act haughtily or to domineer; to lord (it over). 

viscount

noun
  • A member of the peerage, above a baron but below a count or earl. 

  • Any of various nymphalid butterflies of the genus Tanaecia. Other butterflies in this genus are called earls and counts. 

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