| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] a major contribution to | 59 |
|
| 2 | [vb -s] a major contribution to | 8 |
|
| 3 | [vb -s] [verb] a major contribution | 7 |
|
| 4 | [vb -s] [verb] a contribution to | 5 |
|
