How many months/years will my daughter wait till she gets her period? What is the estimation? She has all of the signs but has no period.

Hard to say. girls will usually have first menses within 2-3 yrs of their early breast development.Any girl that has no breast development by 13 or menses by 15 should have an evaluation for delay.
2-3 yrs after breast. In most cases it takes 2-3 years after starting breast development for a girl to start her periods so if it is 3 years or less you can wait. If it has been 4 years since breast development you should have her checked by a pediatric endocrinologist. If she is overweight or obese she could have polycystic ovary syndrome especially if she has excess facial or abdominal hair.