How often does your baby get hiccups?

Ashley • Mommy of 3 Landon (3) Alec (1) and baby Autumn (4 months)
Im 31 weeks pregnant and just started feeling my babys hiccups like a week ago. its like he gets them 3 to 4 times a day now..... It seems so weird and it seems it only happens when i mess with him..... How often do this happen to your baby....