| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] [verb] at the time [prep] | 46 |
|
| 2 | [adv] [vb pp] at [art] time [prep] | 39 |
|
| 3 | [adv] [verb] at [art] time of | 38 |
|
| 4 | [adv] [vb past] at [art] time [prep] | 5 |
|
| 5 | [adv] investigate at [art] time [prep] | 5 |
|
| 6 | [adv] investigated at [art] time [prep] | 5 |
|
| 7 | properly [verb] at [art] time [prep] | 5 |
|
