Since each real estate transaction is different, it is difficult to say, but it is common for the seller to contact you as early as the same day, or within a few weeks at the latest.
If the seller is a small or medium-sized business owner who is quick to make a decision, you may be able to receive a response on the day you submit your purchase application.
However, if the seller is a listed company or a real estate investment fund, it may take several weeks to receive a response because the seller will need to go through various approval processes.