Principles from uncle:
It's sport specific.
If you PL DO NOT FRONT SQUAT if you want to the the very best you can be at YOUR SPORT
If your a WEIGHTLIFTER FRONT SQUAT.
It all depends on how dedicated you want to be in your sport.
I am in the mind set that we are weightlifters so we front squat. No back squats for us. You get good at doing something often, so how often is often? How many times do you train a week? Why introduce another stimulus? The bar is no where near your back when you squat.
I now take a very purisst view on coaching and training.
My mate David Woodhouse tried to make me do something like this about 4yrs ago. I dismissed him LOL even though now he is a visionary! It only took the most successful weightlifting coach in history to convince me to do it...don't waste time. Go against the herd and just do it for 10 weeks strictly. You will get results. I'm not even charging you money!
Sn 50-60-65 in the space of 5hrs with me
CJ 75-82.5 in 5hrs with me
Fs 105-107.5 : this may not seem huge but it's significant seeing as how many lifts he has actually done and anyway, the FS is an assistance to a bigger Sn and CJ.
But if you have to BS I'd try at 20% of the time and see how you get on. The most important thing is to LIFT HEAVY AND TO LIFT HEAVY OFTEN PUSHING ALL THE TIME.