I tried to summarize the units that can be used in the period (Duration). (The link below is the original story)
Week (Example: 2w) Full Business Day (Example: 4d) Partial Business Day (Example: 3.5d) Hours (Example: 7h) Minutes (Example: 60m) Seconds (Example: 500s), Milliseconds (Example: 50000ms) Hours , Minutes, seconds, milliseconds combination (eg 4h 30m) Elapsed time (e3d, e5h, e3.5d, etc. with e to indicate elapsed time).Elapsed time tasks ignore non-working time.The task starts and ends within the specified time regardless of the length of working days or non-working days in the sheet.