| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] know at | 60 |
|
| 2 | not know at | 52 |
|
| 3 | [not/n't] know at | 52 |
|
| 4 | n't know at | 40 |
|
| 5 | not know at | 12 |
|
| 6 | [adv] know at | 8 |
|
