Twenty-four solar terms, how many pairs are matched according to size in total?

The 24 solar terms are: winter solstice, slight cold, severe cold, beginning of spring, rain, fright, vernal equinox, Qingming, Grain Rain, long summer, xiaoman, Miscanthus, summer solstice, slight summer heat, great summer heat, beginning of autumn, early summer heat, white dew, autumnal equinox, cold dew, early frost, beginning of winter, light snow and heavy snow.