| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | not unusual for [adj] [noun] [to-vb] | 10 |
|
| 2 | [not/n't] unusual for [adj] [noun pl] [to-vb] | 9 |
|
| 3 | [not/n't] unusual for [det] [noun] [to-vb] | 5 |
|
| 4 | [not/n't] unusual for [adj] [noun] [to-vb] | 5 |
|
