One weekend lesson per fortnight with 70% weather cancellations in winter, sometimes leading to a couple of months with no flying at all, and 40% in summer would be pretty normal. Really the only way to do much better than that is take time off work (which, even if you have a job where you can, could double the cost of the flying).
Seven instructors for nine lessons sounds a bit much though. Whilst there will continue to be arguments about whether it's better to stick with one instructor, for consistency, or fly with two or three, to get slightly different views on how to correct what you're doing wrong, I've not heard anyone advocate seven instructors as being positively beneficial!