concierge vs practical nurse

concierge

noun
  • One who attends to the maintenance of a building and provides services to its tenants and visitors. 

  • One who attends to the wishes of hotel guests. 

practical nurse

noun
  • A person who is certified to provide custodial care such as help in walking, bathing, and feeding. 

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