| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [is] not unusual for [adj] | 17 |
|
| 2 | [is] not unusual for a | 12 |
|
| 3 | not unusual for a [adj] | 11 |
|
| 4 | [is] unusual for a [adj] | 6 |
|
