| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [adv] upon | 564 |
|
| 2 | concentrate [adv] [prep] | 439 |
|
| 3 | concentrate [adv] [prep] | 439 |
|
| 4 | concentrate [adv] upon | 24 |
|
| 5 | concentrate [adv] upon | 23 |
|
