There are minumum time limits, but no max time limit as long as it stays realistic.
For example, the minumum time to wait to call after getting a number is 3 days, nothing before that. After 3 days, its up to you if you want to wait 5 days,or a month. Although its reccomended you don't wait any longer than a week and a half, 2 at the VERY most....you just met her, remember? You want to seem like a challenge, not for her to forget who you are!
Stick to that guideline all the way until you guys get into a relationship, if it comes to that. At that point, just avoid calling all the time and you should be fine.