We chill coconut oil to get it easily into a chicken, so freezing miconazole would also work. I take the tube of miconazole cream and pry open the beak and squirt the mouth full of it. I seem to end up with much less on me this way.
A moderate or light case of yeast will respond in less than two days to the miconazole. If by the third day there is no improvement, that's when I increase the dosage. You may also give it three times a day. But regardless of how serious or light the yeast is, you must treat for a full seven days.