How long can it take to be a doctor af some kind?

Question: How long can it take to be a doctor af some kind?
- Keywords:
  doctor,
  qualification
Asked by Electrogiraffe to Peter, Miranda, Jack on 16 Nov 2016.
- Peter Boorman answered on 16 Nov 2016:
  
  To get a PhD, in the UK this typically requires >3 years of research, but can be different depending on the person/project.
  
  Peter

Question: How long can it take to be a doctor af some kind?