| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] a [noun sg] for concern | 10 |
|
| 2 | be a [noun] for concern | 10 |
|
| 3 | [be] a cause for concern | 8 |
|
| 4 | [be] a cause for concern | 8 |
|
