It can take anywhere from 3-14 days (give or take) for conditioning.. the male needs a few days at least of feedings 3-4 times a day, the female it varies as she could become eggy quickly, or slowly.
Why keeping them separate except for 10-20 minutes a day helps get her eggy quicker (it's the ideal anyways), as if they can see each other regularly they aren't as.. excited.. some may still become eggy, some don't. But I've had better luck only giving them minimal viewings during conditioning. They get to see each other enough that they don't become overly aggressive and to get excited when they do see one another, but not enough to get them bored of each other. And separate as in, they are both in their own containers/small tanks with something (like paper) blocking their view of one another - remove the paper/object so they can see each other, replace once done. Don't need to move her to and from the tank with him - he should be in a smaller holding container just like the girl.
Some females get eggy easily, some don't.. so have to just go off of your girl. When she has a nice rounded belly (bigger than normal), and it stays rounded between feedings then you can assume she is eggy. The bigger she is, the better.. just don't make her sick with food. I would say 3-4 feedings a day of roughly 4 blood worms each feeding would be enough. Hard to say, as I don't count mine.. I just put them in there (a couple at a time) until I feel they had enough. I also determine if/how much I feed based on whether or not I think she should have some according to her size, waste, etc.
A lot of this is stuff you will learn as you go - everyone does things differently, feeds differently, conditions a bit different. If your girl is a good sized then you can feed her more, if she is on the small side, then less per meal. So only you can really judge.
The vertical lines appear when you place the male and female into the breeding tank.. they are a way of communication, not always breeding. She may show them right away, she may not.. but once you see them, look for other signs such as head down and wanting to follow the male. Those are good indicators that she is interested and ready. But showing the bars and flaring is saying she is stand offish and not quite ready.
But she should show them (if she is a darker color) once she is eggy and in view of the male.