A priest once told me that most people who come to confession are more looking for spiritual direction than to actually confess but do not really make the distinction.
Maybe that accounts for some of it.
Otherwise, there is something we could confess every day if we really thought about it hard enough and we should look in the mirror as often as we can.
For example; I got angry yesterday and was rude to someone when I shouldn't have been but am passionate and get indignant in the face of immorality which sometimes gets the better of me. Then there are always our less than Holy thoughts. We need to practice forgiveness.
If you get a good exam of conscience guide and think in terms of venial sins then you could confess every one of them you recognize if you wanted though you don't have to if they are only venial. Being aware of them is very good for us though. It gives us direction and helps/protects us from degenerating further.
I prefer to go every 4-6 weeks and or only more often if a mortal sin occurs.
Some people would say this is too much, others not enough. Its the balance I find for me but thats not to mean that I am ignoring my venial sins in between confessions either. I have learned the hard way, if I do that, then they will snowball out of control and I will fall into an even darker place than I am now. Sin is deceptively blinding and small sins easily leads to greater ones.
I recall Deacon Bill Steltmyer said Mother Angelica once told him to go confession weekly because he was getting increasingly grumpy over the pressures he was under. She is a saint imo.

Anger is an element of murder.
Whether it be anger, pride, neglect, sloth or any of the other
7 capital sins (see very bottom) or what have you;
We are all struggling with some form of our concupiscience that some of us could probably confess nearly every day or several times a day when it comes right down to it.
Know what I mean?