I believe it's totally normal. I nursed three kids, one until he was three. I worked during the day so I nursed them in the mornings and evenings. When you think about what is normal for a one year old, remember things weren't always the way they are now here in America. Bottles and sippy cups, formula and grocery stores with milk didn't always exist. All my kids preferred the breast over the bottle. Do what works for the two of you, but no need to worry about it :).