Limitation is on the mast
I don’t have a manual to hand but.
There is also an airspeed limitation of around 80/82 knots on the 83-100 Tq range
I think this limitation is on the mast rather than the engine. (I stand to be corrected on this point)
Please don’t ask me the technical reason for the mast.
I am sure there are more educated individuals out there that myself to answer that one
But from a practical point of view if after five minutes you haven’t reached beyond 80kts! Well that’s another story.
As the book suggests it is a Take off range therefore it can be used any time you TAKE OFF.
If for example you a doing shuttle /ferry work which lasts 5mins per sector you are going to use it if required 12 times an hour.
Maybe not the best on the engine but the manual says you can do this.