| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [not/n't] know at the time | 19 |
|
| 2 | not know at the time | 19 |
|
| 3 | [adv] know at the time | 15 |
|
| 4 | n't know at the time | 12 |
|
| 5 | [adv] known at the time | 8 |
|
| 6 | not know at the time | 7 |
|
| 7 | [adv] know at the time | 5 |
|
