| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | make a major contribution to [verb] | 6 |
|
| 2 | [verb] a major contribution to [verb] | 6 |
|
| 3 | [verb] a major contribution to [verb] | 6 |
|
| 4 | [verb] a major contribution to [v-ing] | 6 |
|
