errand boy vs servitor

errand boy

noun
  • Someone in a responsible position who performs relatively menial tasks for a senior manager. 

  • A male employed to run errands. 

servitor

noun
  • One who performs the duties of a servant. 

  • One who serves in an army; a soldier. 

  • An undergraduate who performed menial duties in exchange for financial support from his college, particularly at Oxford University. 

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