I need to standardize a multitude of graphs so they can be compared.
The time in minutes (Length) along the vertical axis and the time of
day (Oper. Starts) along the horizontal axis should be constant/same
for all graphs and the values plotted against those set numbers. In
this case data points are from 8:00 to 13:00 and values are from 0 to
5 minutes. Is it possible to have all the tables for different days of
equal length? How?

Oper. Starts Length
8:09:20 02:10
8:50:30 01:47
8:54:32 01:36
8:54:56 01:47
8:58:36 01:36
9:17:25 01:12
9:58:00 03:22
10:30:12 01:39
11:03:25 02:16
11:39:40 01:38
11:53:15 02:50
11:55:48 02:01
12:08:21 01:39
12:14:21 02:03
12:28:56 02:45
12:53:51 02:26