Elapsed time from start on a recorded track's point instead of the time when it has been recorded

M.Gabor shared this idea ago

Gathering feedback

I would like to see how much time elapsed between the start and a specific point on a recorded track instead of the exact time when that point was recorded. And to go further it could be displayed between two specific points. For example from the start to point A my cycling took 49 minutes. And between B and C it took 3 hrs and 4 mins. Thanks.