not to be pedantic but:
1 knot = 1 nautical mile per hour (speed)
1 knot per hour = 1 nautical mile per hour per hour (acceleration)
BTW 1 Nautical mile is 6000 ft vs statute mile (5280 ft)
I forgot to add that knot per hour makes no meaningful sense and no one uses it
Acceleration, absolutely. A knot per hour is a unit of acceleration. I still remember my freshman physics course. One nautical mile ís 1852 metres (~ 2076 feet).