Once a month, even for venial sins is good. That doesn’t mean you should stress over your next confession for the time in between. For me, it’s easier to see patterns, and also to make progress if I go about once a month. I can also remember what I’ve done easier than if I wait longer. If I end up going too long between confessions, I begin to see sins where there are no sins. The Enemy messes with my mind too much, because I loose track of what I have already confessed. By that I mean he will take something that falls under a catagory I have confessed, and then try to make me think it is unconfessed because it wasn’t specifically mentioned. I’m talking venial sins, here. An example would be confessing to unkind words. That covers all unkind words, and is absolved, but if I go too long, the Enemy will present to me that I never confessed that on my way to my last confession I called a driver a blithering idiot. The catagory “unkind words” covered “blithering idiot”.
When I go once a month, I clearly remember what I confessed the last time, and I only need to confess it again if I have actually done it again. I can discern truth from lie more easily. Which means I walk in absolution better.
It also keeps our venial sins from taking on a life of their own, through which they eventually grow and morph into mortal sins.
God bless you on your journey!
Kris