How many times do you call a girl before giving up?

Anonymous
About a week ago I got a girls number, I called her 2 days later, she didn't answer, so then 2 days after that I texted her, and she didn't respond, then I gave up. I'm asking because I'm having a little debate with my friends, some are saying to only call once, others are saying to call her one more time and leave a Voice Mail. I'm curious as to what most girls think about this. My current belief is that a girl won't call a guy back after just the first call, they are going to wait for him to call again. However this has never happend to me.
How many times do you call a girl before giving up?
23 Opinion