| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | do n't know | 20486 |
|
| 2 | do [not/n't] know | 17185 |
|
| 3 | did [not/n't] know | 5141 |
|
| 4 | do not know | 2708 |
|
| 5 | does [not/n't] know | 829 |
|
| 6 | do [not/n't] know | 58 |
|
| 7 | do nt know | 20 |
|
