Major vs mayoress

Major

noun
  • Title for an army officer with the rank of major. 

name
  • A village in Saskatchewan, Canada. 

  • A surname. 

  • An unincorporated community in Kentucky. 

mayoress

noun
  • A daughter or female friend of a male mayor chosen by him to hold the title mayoress. 

  • The wife of a (male) mayor. 

  • A female mayor. 

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