| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] concerned at the [adj] | 12 |
|
| 2 | be concerned at the [adj] | 12 |
|
| 3 | [adv] concerned at the [adj] | 8 |
|
| 4 | [adv] concerned at the [adj] | 7 |
|
| 5 | concerned at the [adj] [noun] | 21 |
|
| 6 | concerned at the [adj] [noun sg] | 18 |
|
