I think an important thing to remember is that this "Consistency" that everyone keeps talking about isn't just about uploading frequently. It can be achieved in multiple ways.
If you can't upload that often, make sure that when you do upload, that the format is similar to your previous videos. You could designate a day in the week that you'll always upload your video. For my channel, whenever I do have content to upload, I publicize it on Saturday afternoon for most of my subscribers. I also make sure that the style of my content is the same and follows the same kind of structure as my previous ones.