Hiccups

Little baby, 28 weeks, gets hiccups everyday, multiple times a day, in different positions. He doesn't seem to mind because he isn't squirming when he has them. My other two squirmed a lot when they got them in utero. They don't last too long, sometimes 5 minutes.

My question is does anyone else's get them a lot? He started at 22 weeks and just progressively gets them more frequent. They don't bother me and don't seem to bother him.

Anyone else get them this frequent?