| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | they [verb] on [noun sg] | 238 |
|
| 2 | [pron] concentrate on [noun sg] | 47 |
|
| 3 | [pers pn] concentrate on [noun sg] | 36 |
|
| 4 | they concentrate on [noun sg] | 8 |
|
| 5 | they concentrate on [noun] | 7 |
|
| 6 | they concentrate [prep] [noun sg] | 6 |
|
| 7 | they concentrate on [noun sg] | 6 |
|
| 8 | they concentrate [prep] [noun sg] | 6 |
|
