attendant vs registered nurse

attendant

adj
  • Depending on, or owing duty or service to. 

  • Going with; associated; concomitant. 

noun
  • One who attends; one who works with or watches over something. 

  • That which accompanies or follows. 

  • A servant or valet. 

  • One who owes a duty or service to another. 

registered nurse

noun
  • A professional nurse who is a licensed graduate of a university or college of nursing who has successfully passed an examination such as NCLEX-RN. 

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