| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | that [prep] concentrating [prep] | 7 |
|
| 2 | that [prep] concentrating [prep] | 7 |
|
| 3 | that [prep] concentrating on | 6 |
|
| 4 | that [prep] concentrating on | 6 |
|
