Does Facebook Feed Widget Refresh Real Time?

Hello,

I have been unable to find information on when or how often the social Facebook feed refreshes.

Does it refresh in real time so when something is posted on the Facebook page it immediately shows in the feed or is there a delay?

If the refresh is not in real time how often does the refresh happen?

If the feed refreshes in real time does that include showing Facebook live stream? For example if I start live streaming on the Facebook page will it show in the feed or will it only show after the stream is done and published?