Re: Two comments
Bear in mind that the early seasons were over 40 episodes apiece. Each of the first two actors put in over 120 episodes, then the season was cut to 25 or 26 episodes for the third, fourth, and fifth doctors. It was downhill from there with 13 or 14 episodes per season.
None of the actors after Davison put in as many episodes as Hartnell or Troughton did in a single season. Baker (T) still holds the record for most episodes. Pertwee in 5 years did about as many episodes as his predecessors did in 3 years.