| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun sg] [prep] concentrating on the | 21 |
|
| 2 | [noun sg] [prep] concentrate on the | 21 |
|
| 3 | [noun sg] by concentrate on the | 10 |
|
| 4 | [noun sg] by concentrate on the | 10 |
|
| 5 | [noun sg] of concentrate on the | 8 |
|
| 6 | [noun sg] of concentrate on the | 8 |
|
