Wiki Time units over 4 hours

[stormygirl01]

I remember hearing somewhere that its 1 unit for every 15 minutes up to 4 hours. After 4 hours it's 1 unit for every 10 minutes. Can anyone verify this for me. If there is somewhere I can look to get the correct info please let me know.

 

[MBAKER44]

I have seen this with a few insurance companies but do not believe it is a standard written anywhere.