It might be helpful to say something like this: I committed this sin around *** times a day, or *** times a week, or *** times a month. Knowing the frequency will help the priest to know how habitual it is for you and give you proper advice.
For example, saying your sin was commited ten times makes a big difference if it is ten times a day, versus ten times a month. I hope this helps you. It is usually what I do when I can’t remember the number of times.
Another useful tip might be to say why you fell into it. I had a bad habit of profanity due to being around people that used it. It took a long time to get over it, but I noticed whenever I went to confession, which I did at least monthly, the number of times grew lesser and lesser, which I think was the grace of the sacrament and my determination to stop. Occasionally, I would belt out a good one whenever I was aggravated or impatient, and I would confess the source of the problem. “I used profanity *** times due to impatience.”
May Our Lord give you the blessing and grace of a truly good confession!