There are no hard and fast answers to this question.

Generally it depend upon close you are to God. If you’re Saved then the board will speak to you immediately as the Spirit will be desperate to convert you away from God. If you’re an Atheist then it may take up to an answer to receive a response as the Spirit knows you are already one of his own.

If you want to intimidate the board into action then I’d advise you to start praising God in front of it. You could even try reciting the Lord’s prayer whilst thumping the board with your fist with every syllable in order to provoke the strongest response from the Ouija.