How Long and How Much?

YOU: How long have you been observing Granddad?
OWEN: I’ve been observing him for two years.

YOU: How much vegetation has he been eating?
OWEN: He’s been eating a lot of vegetation.

YOU: How often has he stopped for water?
OWEN: He’s stopped for water four times.

YOU: How much water has he been drinking?
OWEN: He’s not been drinking much water.

YOU: How long has he walked today?
OWEN: He’s walked nine hours.

YOU: How far has he traveled today?
OWEN: He traveled over 30 miles.