if there is consistency within the field, you could setup an array and "split"

A more straight forward approach may be to just do this:
Create however number of formula fields (equal to the max number of values in that field).

If its three, you would just need a left/mid/right function thought.

@form1
left({Field1},4)

@form2
mid({Field1},5,4)

@form3
right({field1},4)

I didnt check the functions syntax, I hoped you would get the idea.