Is it Baby Hiccups?

I am 31+3 and I believe my baby is having hiccups 1-2 times a day. Im not sure though because of the time in between them. For myself and other adults, if i get the hiccups, its about 30 seconds between each hiccup. But with the baby it feels more like a rhythmic tapping, about 5 seconds or less between hiccups. Is this how your baby's hiccups feel or should i be concerned this is something else?

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