I see no problem with using the term “Lusting” and the number of times manifested.
In fact, when I made my confession after a 35 year absence from the Church, this is the form I used. I looked at my sinful life, and saw that much of it fit into the various catagories of the “
Seven Deadly Sins”. As I examined my life, it also became obvious to me how one led to another and to another. (and much of it began with lust and, of course, selfish pride)
Anyway it seemed silly, after 35 years, to try and go through specific sins and numbers so I examined how one vice (deadly sin) led to the next and how others, while not direct, fed into the main ones…I also mentioned some of the negative (in my case severely negative) effects these sins had on others in my life.
I wrote all of this out, took the page and read it to father in confession so that I would not stumble or leave anything out.
It was the best confession I ever made and I felt completely resored afterward!!
I share this because I see that you are in RCIA and so perhaps, if you are trying to cover a lot of ground, such an approach might serve you well also.
Peace
James