Girls don't generally like the 'lets meet now' vibe. Have to get her to commit to a plan. But don't get frustrated if she flakes. Stay calculated. There's threads on here about dealing with flakes. Hit her with "What's your schedule like?" or "When are you free?". The 2nd one puts her in a position of having to make a decision. This is generally bad, as women are notorious for being indecisive. But sometimes it makes more sense if she's already established that she stays busy.