| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] know at the time | 15 |
|
| 2 | not know at the time | 14 |
|
| 3 | [not/n't] know at the time | 14 |
|
| 4 | n't know at the time | 12 |
|
| 5 | know [pers pn] at the time | 13 |
|
| 6 | know [pron] at the time | 13 |
|
| 7 | know it at the time | 12 |
|
| 8 | know it at the time | 12 |
|
