How much belly time do you give your bubs?

When I was at the MCHN the other week, she said I should be putting Miss Z on her belly as soon as she wakes up, and to basically have her on her belly the whole time she is awake!

She said due to the SIDS recommendation of bubs having to sleep on their backs, that they need more belly time to develop (or something along those lines, miss Z really doesn't like the MCHN visits lol)

So, out of curiosity, how much belly time do you give your lil ones?

Really interested in reading what the go is with you lovely ladies!