D96B Data Element 2151

2151
Agreed or specified period of time (coded).
3M
Quarter
6M
Half-year
AA
Air hour
AD
Air day
CD
Calendar day (includes weekends and holidays)
CW
Calendar week (7day)
D
Day
DC
Ten days period
DW
Work day
F
Period of two weeks
H
Hour
HM
Half month
M
Month
MN
Minute
P
Four month period
S
Second
SD
Surface day
SI
Indefinite
W
Week
WD
Working days
WW
5 day work week
Y
Year
ZZZ
Mutually defined