Yes, Five to Six days per week. You need the 6 weeks to build your musculature up, even if you feel you are doing the exercises OK. You need to be building stamina and other skills. Pay very close attention to the instructions in the videos, and make sure you are doing everything exactly as Ken instructs.
As Scott says, you're building the foundation for your voice. Make sure the concrete has time to properly cure before you start putting a load on it!
Do your workouts and build your strength. You're going to need it!
And Welcome to KTVA!
You can double-up or triple-up, as long as you don't blow out your cords from overdoing it. If your voice gets a little tired, take a break or lighten up the sound a little.
Nigel is quite correct. All of Ken's students have begun a Lifetime Journey to Vocal growth and improvement. Your development will continue for as long as you continue to sing and use Ken's methods.
KTVA is not an overnight, quickie, flash in the pan. It is a blueprint for continued, long-term vocal benefits. Some results will happen very quickly, but some will still be developing for years.
Ken still works out for at least an hour prior to teaching, in which he sings for hours more. Ken is still continuing on his journey, and is still learning, discovering, and adding more to his lessons and methods.
You do get what you put into it, but everyone starts from a different point of reference, so the answers to many of the questions are relative to the current skills and experience of the asker. That information is often not provided in sufficient detail to calculate a more exact timeframe.
At any rate, singing IS a lifetime journey. For some, that journey may be cut short, when singing with poor technique ends a vocal career. In Ken's case, and in many others' the quest continues, and new things are always around the corner when you continue to study, work out, and strive for improvement.
There are no exact, one number fits all answers to general questions about individual timelines. Your mileage may vary.
Good singing to you! And may your journey be long and enjoyable!
You can google this question and get a few different opinions.
It's generally based on what note your passagio shifts from chest voice into head voice.
Can you tell us where that happens for you?