There is a saying in classical astrology, for example, the ruler of Aries is Mars, but there will be a smaller ruler every 10 degrees. Without looking at the first card, the numbers 2-4 correspond to the basic constellation, 5-7 to the fixed constellation, and 8- 10 to the changing constellation. We can sum it up as "two four basic, five seven fixed"
"Guards don't look, knights correspond to changing constellations, queens correspond to basic constellations, and kings correspond to fixed constellations".