| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | the [noun sg] concentrate on the | 40 |
|
| 2 | the [noun sg] concentrates on the | 17 |
|
| 3 | the [noun sg] concentrated on the | 12 |
|
| 4 | the [noun sg] to concentrate on the | 9 |
|
