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