minder vs nurse practitioner

minder

noun
  • A monitor assigned by the authorities to someone, such as a foreign visitor (to exercise control over their contacts with the populace) or a journalist or someone who is speaking to journalists (to monitor and control what they say). 

  • One who minds, tends, or watches something such as a child, a machine, or cattle; a keeper. 

  • A personal bodyguard. 

nurse practitioner

noun
  • A professional nursing designation recognized in some jurisdictions, denoting an individual who is fully qualified as a nurse and who has additional qualifications and authorization to provide diagnoses and/or treatments, including writing prescriptions . 

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