| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | n't know about | 541 |
|
| 2 | n't know for | 53 |
|
| 3 | n't know of | 49 |
|
| 4 | n't know at | 40 |
|
| 5 | n't know in | 18 |
|
| 6 | n't know until | 17 |
|
| 7 | n't know to | 14 |
|
| 8 | n't know with | 9 |
|
| 9 | n't know from | 6 |
|
| 10 | n't know by | 6 |
|
| 11 | n't know till | 5 |
|
