| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pers pn] [prep] a time [Wh adv] | 18 |
|
| 2 | [pers pn] [prep] a time when | 18 |
|
| 3 | [pers pn] at a time [Wh adv] | 16 |
|
| 4 | it [prep] a time [Wh adv] | 6 |
|
| 5 | them [prep] a time [Wh adv] | 5 |
|
