| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [not/n't] know [pron] | 7075 |
|
| 2 | [not/n't] know [prep] | 952 |
|
| 3 | [not/n't] [pron] [prep] | 724 |
|
| 4 | know [pron] [prep] | 557 |
|
