Draw the first one and then use the Move/Copy function to create the rest. Copy the hole over the requiste distance, hit Enter and immediately type xn where n is the number of additional holes.
Conversely, if you a working to a fixed length of wood and need the holes to be equidistant from each other, you draw the first one, copy it to the far end of the line then type /n followed by Enter. Again n = the number of copies. SU will then fill in all the intermediate holes between the first and last ones.