Me and this girl are both on break from school, and just started dating. How often should I ask her out?

Once a week. Give her 3-4 days' notice and have the date already planned so you can offer her an exact 1) Day, 2) Time, and 3) Place.

Only talk to her for about 10 minutes if she calls you between dates. Otherwise, you make her wait until the date for some conversation. That gives her more reason to say yes to each date offer. (If you talk between dates, she may get bored or you may say something stupid that causes her to cancel the date.)

After 7-10 dates, she should be asking to be exclusive.

BTW, absolutely NO texting! Make the dates by phone so there are no misunderstandings.

If she asks you out on a date, take it. But not every single week.

Once a week is usually pretty good, but if you just want to hang out with her you could do that upwards to three times depending on how easy it is for you to do so.

I think you should make small talk with her when school resumes and ask her to meet somewhere ( in person) say you really would like to get to know her better in person