marcher vs preceptor

marcher

noun
  • An inhabitant of a march (border country); specifically, a marcher lord. 

  • One who marches; one who participates in a march. 

  • A border territory, a march (now only in (attributive) use). 

preceptor

noun
  • The head of a preceptory of Knights Templar. 

  • A doctor who gives practical training to medical students, nurses etc. 

  • A teacher or tutor. 

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