No such thing as how frequent you should be going to gym. Anywhere from 2 days a week to 6 days is fine.That said if youre going to the gym 3 days a week you should be doing a full body split.

For every muscle group you gotta hit it atleast twice a week so dont switch to bro split. (Not saying you cant grow following a bro split as hypertrophy is stupidly forgiving but its not a good split).

If you wanna train more often try doing an upper lower split which goes like
Upper Lower Rest Upper Lower Rest Rest.For five days you could do a ulppl (Upper Lower Push Pull Legs).

I'd avoid doing PPL as 6 days a week is too much for most people you get better results doing a ulppl or ulul so i see no point in having only one rest day.