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