Good find, Raggy. So what does this tell us?
First we need to isolate that "shipped off-planet" is what the Notum Cannons are doing.
So, based on the Historic Chunk we know each chunk weighed about 0.2kg.
4,500,000,000 chunks at 0.2kg each means the freighter is transporting +/- 1,000,000 tons.
Now, we worked out that each shot sends 570.76lbs into orbit.
570 intoone million1,984,160,360 (1m tons) would be 3,476,348 shots of the cannon to fill one freighter.
14,400 shots per day means that a Notum freighter fills to capacity in 241 days.