For my 2.5 yr old son, he has school 3 times a week (Tues, Thurs and Friday). On Monday he has a swim lesson in the morning and on Wednesday, we usually have a planned playdate with a friend either with me or with my helper. In the afternoons, he has a planned playdate with helper/child every Monday, on Tuesday he has a helper-run playgroup with kids in our building and then on Wednesday he has drop off Mandarin class. Thursday and Friday afternoons are reserved for mommy/son time or free swim. When he was 6-12 months, we had Panda Junction and classes at the American Club in Hong Kong like Kindermusik and then we did Music Together. So I guess 3 structured classes with mommy and then the rest of the mornings/afternoons we did playgroups in our building, playdates walks along the Stanley boardwalk and beach/pool time.
I just had #2, but I imagine since the gap is big enough my elder will be going to more drop-off classes and I will not need to be there. If an adult needs to be there, then my helper will step in for my older one. I prefer going to classes with my baby in the first 12/15 months rather than my helper.