Phew, what a question...
I had to take of my shoes and socks to do the counting
I would generally see at least 1 E-I girl per month (depending on location & Finances).
Also, I would generally visit at least one girl in the UK every 2-months (work related travel).
I must admit that there is an agency in London where the girls are very competitively priced (two hours for the same rate as 1 hr in Ireland) and fantastic to be with - every bit as good as the girls on E-I.
It's difficult to count as I have been "using" now for about 13yrs, but I would estimate that I have seen around 100+ girls, professionally, over 3 continents in that time, and only one or two have been seen more than once.
Obviously, safety has got to be paramount when visiting multiple girls and you should try to ensure that safety for both you, the girls and any partner you may have too.
I must admit, I would be prone to visiting one girl on a regular basis, if she had a particular skill set and was regularly available to me - though I am mindful that seeing a girl too much can lead to fears of "stalking" and a risk of becoming too attached.
Keltic