| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | two hours at | 23 |
|
| 2 | three hours at | 15 |
|
| 3 | four hours at | 12 |
|
| 4 | 24 hours at | 10 |
|
| 5 | 2 hours at | 6 |
|
| 6 | 48 hours at | 6 |
|
| 7 | five hours at | 6 |
|
