The given presets are only rough estimates for a solid trainer with 10 assistants at
100% intensity...

Remark: The input number of weeks for the reference age is only of
theoretical meaning, because the player is getting older during training,
i.e. a 17.5 years old player (mid of the season) needs slightly longer than with
just 17! Giving any two of the three numbers in the red line will calculate the third!