| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb pp] [adv prt] at the time [prep] | 13 |
|
| 2 | [vb pp] [adv prt] at the time [prep] | 13 |
|
| 3 | [vb pp] [adv prt] at the time of | 12 |
|
| 4 | [vb pp] [adv prt] at the time of | 12 |
|
