Non-NISO duration standard

My peers have adopted the following non-NISO duration standard:
  • Shortly is less than 17 mins or 29 mins.
  • In-a-bit is less than 29 mins.
  • Half-hour is 30 to 50 mins.
  • In-a-while is about 1 hour.
  • Later is about 2 hours.
YMMV.