| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pn reflx] [verb] on | 202 |
|
| 2 | [pron] to concentrate on | 53 |
|
| 3 | [pn reflx] [to-vb] on | 35 |
|
| 4 | [pn reflx] concentrate on | 13 |
|
| 5 | [pn reflx] to concentrate [prep] | 11 |
|
| 6 | [pn reflx] to concentrate on | 11 |
|
| 7 | [pn reflx] to concentrate [prep] | 11 |
|
