Finding the Distance & Timeframe & Speed[]
A quick google search tells me that the milky way is 100,000 Light Years in width which is 9.4607305e+17 km.
Hollow crossed it in a nanosecond.
1000000000 Nanoseconds = 1 Second.
9.4607305e+17 x 1000000000 = 9.4607305e+26 km/s.
Which is equal to 3,155,760,009,146,061,030,000c. 3 Sextillion Times FTL.
Massively FTL+