| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it 's [not/n't] [conj] | 308 |
|
| 2 | it 's [not/n't] known | 11 |
|
| 3 | 's [not/n't] known [conj] | 7 |
|
| 4 | it 's known [conj] | 7 |
|
