| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | did [not/n't] know [prep] | 288 |
|
| 2 | [vb past] n't know [prep] | 222 |
|
| 3 | [vb past] [not/n't] know about | 179 |
|
| 4 | [vb past] not know [prep] | 66 |
|
| 5 | [vb past] [not/n't] know of | 39 |
|
| 6 | [vb past] [not/n't] know at | 27 |
|
| 7 | [vb past] [not/n't] know for | 13 |
|
| 8 | [vb past] [not/n't] know until | 10 |
|
| 9 | [vb past] [not/n't] know to | 5 |
|
