If you are looking to frequently, especially for strength gains, Just go to JimWendler.com, there is a pop-up that gives you a link for the Frequency Project. It has you training 12 days out of 14.
For max growth you could just do the Boring but Big template. REST is just as important as training when it comes to growth. If you want to double the amount of training in the program, which cuts deeply into the amount of rest, you might not get the results you are after.
Consistently training twice a day isnt really something you just jump into normally, especially if you are going to be training balls out each session. Even elite athletes that do train twice a day have built up to it over the years, are probably on drugs, and it is there life and job to do so.
Or as the Hodge Twins would say... You go out there and do whatever the FUUCCCKKKKK you wanna do. The ONLY way to know anything for sure is to try it on yourself and see what happens.