How much time did you usually spend on one of those D traveling in a train, bus, car, tram, or other kind of motor vehicle during the last 7D
how much time did you usually spend on one of those d traveling in a train, bus, car, tram, or other kind of motor vehicle during the last 7d
How much time did you usually spend on one of those days traveling in a train, bus, car, tram, or other kind of motor vehicle during the last 7 days
how much time did you usually spend on one of those days traveling in a train, bus, car, tram, or other kind of motor vehicle during the last 7 days