peri-gee : Near the Earth (Geo). The gee sounds often relate to the Earth. This is the point at which any graha is nearest the earth.
apo-gee : The furthest point from the Earth.
peri-helion : Helios is the Sun. So this is the point in the planet’s orbit that is nearest the Sun.
ap-helion : The point in the orbit that is furthest from the Sun.
uccha : High. A graha is considered to be exalted or in exaltation when it is High.
neeca : Low. A graha is considered debiltated when it is at it’s low point.
śeeghra : fast
śīghra-uccha : śīghröccha – fast and high
manda-uccha : mandöccha – slow and high
If you look at the diagram above, you can see that when the Sun is high, Saturn is low and Vice-Versa.
There is a story that the Sun and Saturn maintain a distance from each other. This could be a reason why.