| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [coord] it is not unusual for | 9 |
|
| 2 | [coord] it is [adv] unusual for | 9 |
|
| 3 | [coord] it is not unusual for | 9 |
|
| 4 | [coord] it is [not/n't] unusual for | 9 |
|
