| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [not/n't] know how | 1877 |
|
| 2 | know how [noun pl] | 91 |
|
| 3 | [not/n't] know [noun pl] | 20 |
|
| 4 | [not/n't] how [noun pl] | 10 |
|
