| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been [det] concern | 9 |
|
| 2 | [verb] been [det] concern | 9 |
|
| 3 | [vb -s] been [det] concern | 7 |
|
| 4 | has been [det] concern | 6 |
|
| 5 | been [det] concern [prep] | 5 |
|
| 6 | been [det] concern [prep] | 5 |
|
