amount used; quantity consumed; usage
Refers to the amount of something used or consumed, such as electricity, water, data, or materials.
This month's electricity usage was lower than last month's.
I check my smartphone's data usage.
使用料 (a usage fee, money paid) and 使用量 (the amount used, e.g. of electricity or water) are pronounced identically but mean very different things.
Compound of 使用 (use) and 量 (amount).