Yeah, time frames vary, depending on how well the friendships are... my BIL lived with my H for 8 yrs, 4 of which while I was there, and let me tell you... it cramped my style and chapped my hide pretty bad! But, it was 'family'... IMO, it was a 40-year old deadbeat, wallowing in his own self-pity- would not take responsibility for sh!t. But I digress. (No, I'm not bitter, )
Now, to address your personal dilemma. Woman are flighty. They want to also be coy. I would not expect her to call, and that may be a hurtle you might have to over come, my friend, because it sounds like, to me and this is only my humble opinion, that it's a little extreme to expect that when people say 'they will call' and they don't you get ruffled a little. To me, it sounds like she wants to be spontaneous, where it appears you may be more of a planner? Am I correct? Am I getting close? I can only imagine that you would like her to be 'more responsible'? So, she may feel a little pressure from this, if this is the case.