| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | to concentrate on [adj] [noun] [conj] | 15 |
|
| 2 | to concentrate on [adj] [noun] [coord] | 12 |
|
| 3 | to concentrate on [adj] [noun] and | 10 |
|
| 4 | to concentrate on [adj] [noun] and | 10 |
|
| 5 | to concentrate on [adj] [noun sg] [conj] | 10 |
|
| 6 | to concentrate on [adj] [noun pl] [conj] | 9 |
|
| 7 | to concentrate on [adj] [noun] [subord] | 6 |
|
