| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | concentrate on one [noun] | 33 |
|
| 2 | concentrate on one [noun sg] | 32 |
|
| 3 | concentrated on one [noun] | 10 |
|
| 4 | to concentrate on one [noun] | 7 |
|
| 5 | concentrating on one [noun] | 6 |
|
| 6 | concentrate on one [noun] | 5 |
|
