| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] at the time [Wh adv] | 51 |
|
| 2 | [verb] at the time when | 45 |
|
| 3 | [verb] at the time when | 45 |
|
| 4 | [vb pp] at the time [adv] | 30 |
|
| 5 | [verb] at the time [adv] | 12 |
|
| 6 | [vb infin] at the time [adv] | 11 |
|
| 7 | [vb past] at the time [adv] | 10 |
|
| 8 | know at the time [adv] | 5 |
|
