There are many ways to do timing questions. It's not a question of it something is right or wrong, as it rarely is in Tarot. If it works for you, then it's right for yuo and keep using it. If it is not working well for you, then it's not right for you and just let to drop.
What works for each of us is not the same. Most things in Tarot work for some people and not for others. You have to find for yourself what works for you, even invent your own methods at times. But there is never any right or wrong to it.
That being said, and just to confuse things. The way you mentioned above is one way to do timing questions. It is not the one I currently use.
The way I do it:
The Majors mean that the querent has some very important life lessons to learn and the event can only take place after they have learnt them. Eg if the Strength card comes up in a timing question, it would say that the querent is not yet ready inside or strong enough inside to handle the event if it were to happen now. It will only happen once they have become strong enough inside to handle it and deal with it properly...When it happens depends on how quickly or how slowly the querent decided to assimilate the lessons shown in the card. It's their choice and up to them how quickly they decide to learn them.
As for the Minors (Aces to Tens)
Wands=Days
Cups=Weeks
Swords=Months
and
Pentacles=Years
You can also add in the number to be more precice. Eg: teh 5 of Cups means it will happen in 5 weeks, the 10 of Pents means it will happen in 10 years, the Ace fo Wands means it will happen in one day (from now till tomorrow)...
As for the Courts, they just say that there is someone else in your life that is holding up the event from happening. When they get their act together and are ready, then and only then things will change in your life. They even can only happen when they are ready and they have not yet decided what they want to happen or what they want to do...
Hope that didn't confuse you more. LOL
Babs