As far as I know, there is no way to control how often a specific type of spawner shows up.
Simply because I set up my spawners to appear further out, the game automatically phases them in at this distance and phases the old ones out further away.
I could possibly just add a setting to set all distances to 0 though, but that means you could end up with super spawners on your doorstep, however, the reason why I set things up like this is because the base game already has a system to handle worms like this, making it so behemoth worms don't spawn on your doorstep.