Quoting ♫ boobook ♫:" I agree to a point. But don't you think 4 nursing sessions in a 24 hour period is too little at 9 months? My sons pulled this same kind of thing for a few days, but not weeks. KWIM?"
No... My son did the same thing. He only nursed around 4-5 times a day around this age... It depends on how much they are taking in. I mean, baby could be taking in a lot of milk during each feeding... We have no way of knowing how much exactly since it can't be seen...
The main issues are weight gain and wet diapers. If both of these are happening as they should then no, I would not be concerned. It means baby is not dehydrated and is getting enough calories...If she is losing weight then I would be concerned yes. 100%.
OP, I just remembered that if you make an appointment with an LC they can weigh your babe before and after a feeding to see how much they are taking in and make recommendations. Maybe doing this will help you relax or give you an idea of what direction to head in.