how long did Tim have to train before going up into space?

Question: how long did Tim have to train before going up into space?
- Keywords:
  Tim Peake,
  training
Asked by Jackthelad to Col Op, Elie, Floris, Jenn, RocketRich on 4 Mar 2016. This question was also asked by jack, T'keyah Mendes, Jastronaut.
- Floris Van Den Berg answered on 4 Mar 2016:
  
  Tim started his training in September 2009, he left in December 2015, so more than 6 years!

Question: how long did Tim have to train before going up into space?