Letrozole

Hi, it looks like I’m starting another cycle. I conceived our daughter (#1) in 2019 on just letrozole and TI (which wasn’t that timed because I didn’t track anything due to not ovulating on it the month before and having a “it won’t work” attitude😂) after four failed IUIs and two failed IVF transfers of three embryos total. We are ttc #2 now and I’ve done two cycles of letrozole so far. First cycle was 5mg and second was 7.5. Both cd 3-7. I’m gonna do 7.5 mg again but my doc left it up to me on which days to take it: 3-7, 4-8, or 5-9. Is there any benefit to one over the others? I took it cd 3-7 in 2019 when we conceived before. I’ve read 3-7 gives more follicles but 5-9 gives more quality to the follicles. Just wondering what everyone else would do. Thanks!