the.com/rainfall
The sky settling its debts with the ground, one drop at a time.
means The amount of water that falls from clouds as rain over a given area and time, usually measured in millimeters or inches.
from A plain compound of rain and fall, both Old English bones, describing exactly what it says since at least the 1600s.
Measuring trickOne inch of rain spread flat over a field.
Wettest spotMawsynram, India averages 467 inches yearly.
Atacama desertSome areas logged no rain for centuries.