Some artists believe they shouldn't consistently release new music because they don't have the means to market all their new releases if they're consistent.
But I say, release music as consistent as you can even though you can't market it all.
You just have to concentrate on the ones giving you the most traction and market those or if its only one shining more than others then market that one. Because if the one you do market makes you blow up and if you were consistently released songs then there is more music your fans have to listen to. You will have a lot more material to entertain them. Your other songs will become popular and can even become hits.
If you are not consistent and lets say you have one song that blew you up then there's a possibility that you can become a one hit wonder. The more you have the better for your music career. The more you have for your fans the better your career in music will be.
So, go out there and be more consistent. You don't have to market all of it.