| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] have been concerned for some | 5 |
|
| 2 | have been concerned for some [noun] | 6 |
|
| 3 | have been concerned for some time | 5 |
|
| 4 | have been concerned for some time | 5 |
|
| 5 | have been concerned for some [noun sg] | 5 |
|
