It’s possible to have high volume but low level of activity
Think of the business that sells submarines
Volume is huge but level of activity is restricted probably to single digits
(It’s also possible to have low volume and high level of activity. Think of your neighbour with 30 hens, all laying one egg each day. Value of 30 eggs is … 6 euros? But your neighbour is up and down all day selling 6 eggs to each of his immediate neighbours – he hardly has a moment’s peace)