GRANDPARENTING QUESTION - how much time do you spend with your grandchildren?

After I just added this as a comment, I see the Discussion starter. Sorry for the double post!

 GRANDPARENTING QUESTION -

How much time do you spend with your Grandchildren, on average?

We have been married 10yrs and have a total of 5 children, 8 grandchildren (and 3 more 'in-law grandchildren to be' after August)

We have the 2.5yr old triplet boys & thier baby brother (4mo).
We generally go over one evening a week for dinner, and I spend most Saturdays - at least 1/2 the day - over there. My Son-in-law is a mailman, so he's at work on Sat...nice to have some time w/my daughter & grandsons. Then we might get together another time or two during the month on Sat evening / or Sunday to do something together. They live about 20 min away.

Our other Grandchildren, (my husband's daughters kids) we seem to only get to see them on family holidays, get togethers. We host at least one immediate family event in our backyard (there is a total of about 22 - just with our 5 kids / spouses / grandkids) and a family backyard gathering with both of my husbands sisters & their families as well - total 32ppl).

My step-daughters also live only about 20 min. away. We chat online & via phone..but they just don't seem to have time to get together. We have never been invited over for dinner, or any of the grandkids school events.

Anyone else have similiar family set up? Is this normal? Hello?!?! lol