New Visa For Infant

For first, it depends on how many people there are. Anywhere from 10 mins to a few hours.

Don't get your second question.

Thank your reply

my second quetion is that after booking Air Ticket whether we want to confim visa details with the airlines in Bahrain or no need just can be shown during travel for visa confirmation

I am not sure about your country's processes. If you are referring to ok to board, that is generally for visit visas.  Someone else can comment on that.

Thank you

I think you are asking if you need to present your visa to airline,
the answer to that is no, but at the time of travel you must have any kind of valid visa on that day.

If your question is something else, please elaborate.