/fillsummon command

I use the / summon command to create an entity. 
However, to compare an entity to a block,
it seems that there is still only the / setblock command,
so / fillsummon <entity> <pos1 x> <pos1 y> <pos1 z> <pos2 x> <pos2 y> <pos2 z> [y interval default = 1] [x Interval default = 1]
I would like to make a command. In addition, the unit of the interval is a block.
(I used translator)