I don't think that there is any biblical basis to answer this question. But in my opinion and I believe I have the wisdom of God: I don't think she can know until God presents the man she's been in faith to receive. If he hasn't showed up then this could possible mean she isn't ready or he isn't ready to be presented. What to do in the mean time? Wait patiently, and prepare. Get as much understanding as possible on marriage? It's purpose, rid yourself of sin/iniquity, rid yourself of debt, past hurts and insecurities etc... Prepare a detailed list of the qualities we expect our mate to have and stay in faith until that man has been presented without compromising. I've been married twice and experiencing my second divorce. Disappointed, no wants to experience failure. I've written a book about the whole ordeal called The Garden of Gethsemane the Place where I Died! I was in faith believing God for what He showed me I could have. I got in my flesh/fornicating, blocking the favor of God ended up in financial difficulty and married the man without having any peace about it. I let the enemy talk me out of what I was believing God for and settled for someone totally outside of the will of God. We were married 6 yrs and it was disastrous. I finally got free from the bondage and fear that caused me to marry him in the first place. God has been faithful to me to right my wrong and restore my dreams and my faith. I have since prepared a list of what I am expecting from God. These are some of the things on my list. I compiled this list so that I do not make the same mistake. He must be:
1.Born again, filled with Holy Spirit, with the
evidence of speaking in tongues. For at least 20yrs and a tither.
2.He must be out of debt.
3.He must be financially free and prosperous.
4.He must not be struggling with any works of the
flesh.
5.He must be called to five fold ministry with a
working and active vision.
6.He must be connected, accountable and submitted
to Bishop Benjamin Gibert directly or indirectly.
7.The favor of God must be visibly on his life.
8.He must have a convincing, documented testimony
of God speaking to him, him obeying God and the results of God speaking to him.
9.His relationships should reflect his character
and spiritual fruit.
10. He has to be attractive to me and there must be
chemistry.
You see when you get the wrong one, you will be more specific with God so that we will know the right man when he comes along. You can see that my list is not superficial but well warranted especially after what I just went through.