This isn't linear nor is it any time frame...
This stuff comes down to calibration and should also be mixed around depending on the situation.
If the chick already has her attention on you, giggling and still standing and interacting with you then attraction is already done. In this case there isn't much stuff needed to be done as far as attraction go.
If the chick was locked up and being very unresponsive, you'd be in attraction and could end up being in attraction for hours depending on how unresponsive she is. Though most guys will eject 2mins after they realize she's unresponsive because they don't like what's going on in the set.
If a chick was already attracted you could skip attraction and just qualify a chick, most chicks who I know is already attracted...(Seems to be every chick lately) I always qualify them right off the opener.
For me it's all about not overgaming and always moving the set forward. To do attraction stuff when you've already got attraction is an overkill and will push the set backwards. Thats not to say you can't do attraction stuff, it just means use it when it's needed.