Get Rid Of Freckles

Hey, I have alot of freckles too, but i`m dark haired and brown eyes my dad comes from scotland and he has alot of freckles too so i guess i get it from him lol. For the lemon juice how long should i keep it on for? Anything that helps fade is good for me, cause i hate them. Somedays i get to not even bother about them but others i just go crazy. Lol. So if you guys could just please how long to keep the stuff on that would be great cause i have no idea.

Thanks alot everybody.
Stéph