The main food for your baby for the first 2 years is your breastmilk. Supplementary foods/semi-solids is just to supplement.
My baby is coming to 21 months old. He nurses as & when he like when I'm with him over the weekends. He sleeps with me at night & nurses as & when he needs to.
Every baby is different. While you're a bit troubled that your baby is still nursing too frequently like a NB, my friend is troubled that his 15 months old baby refuses EBM. I've a friend whose very experienced in breastfeeding, is nursing her 4 year old 17 times over 24 hours. Babies know what they need.