How often should I text her?

So I am about the worst person in the world when it comes to dating knowledge (knowing when girls like you, flirting, the whole lot). I am also about the shiest person in the world when it comes to the first stages of getting a date, not to say I haven't done so though. I met a girl I like through a friend and she seems to like me back but if you refer to the first two sentences you'll find my problem. Long story short I have her number but how often should I text/talk to her? Everyday? I want to get to know her more and set my self up to asking her out but I don't know how often could be too much and what could be too little. Thanks for the help!

P.S. don't get fooled by the name, I borrowed my dads account, he hasn't used it for a while.