| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | a matter of [noun] | 2845 |
|
| 2 | a [noun sg] of concern | 170 |
|
| 3 | a [noun] of concern | 170 |
|
| 4 | a matter [prep] concern | 56 |
|
| 5 | [art] matter of concern | 46 |
|
| 6 | a matter of concern | 46 |
|
