| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | concentrate on [noun pl] ['s] | 10 |
|
| 2 | concentrate on [noun pl] [unc] | 10 |
|
| 3 | concentrate on [noun pl] 's | 6 |
|
| 4 | concentrate on [noun pl] 's | 6 |
|
