| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adj] contribution to the study | 11 |
|
| 2 | [adj] contribution to the study | 11 |
|
| 3 | contribution to the study [prep] | 13 |
|
| 4 | contribution to the study of | 13 |
|
| 5 | contribution to the study [prep] | 13 |
|
| 6 | contribution to the study of | 13 |
|
