There are so many different ways of doing this that it's quite hard to answer.. it depends on your starting situation. If it really is just a divided cuboid, then it's quicker during generation than adjusting later.
For instance, starting with a duplicate face of one end of your wall ..
- EY0.5 to make the first section
- ShiftR, repeat, to add as many more as you like
Now you can snap the correctly-divided section into the rest of the wall.
- You could set the length of the entire section (say, 2 units) during generation
- Then CtrlAlt select the edge-ring of long edges
- And WS subdivide the ring, setting the number of cuts, in this example, to 3.
If you really need to move existing edge-loops to the right place, you could use one of the previous methods to generate a 'jig'.. a ruler-object with vertices at the right interval, for use solely as a snap-target when moving existing loops. I often have a bunch of these objects, representing lengths or angles, usually copied from somewhere else in the model, hanging around my workspace, just to snap to. You can delete them when you're done.