Timed mating advice

Hi y'all I've got a lovely girl and would love to breed her in a couple weeks. I'm looking for any advice on how to do a timed mating. We're doing frozen semen.<br><br><br><br>I know my girl is 15 days post heat and she's giving plenty of standing heat (2 times a day) and good standing heat even outside the two times a day I'm giving her heat in the arena. I had her up the heat and she stood for 15 minutes without wavering to an in tact male. <br><br><br><br>Since she's on 15 days post heat is it safe to assume she'll be ready to ovulate in the next two weeks? How would you guys catch an accurate AI and the breeding of a mare in a 2 weeks time frame. <br><br><br>I would assume getting Tc on the 18th day post heat or 3 days before the expected onset of heat and compare them on 5-7 days to see what the progress is?! Tc every 4-7 days from there?!<br><br><br> I also heard something about not breeding a mare to early in heat or she'll retain an early embryo!! And the generally 3-5 days of standing heat is key?! TIA