| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [verb] a [adj] contribution to | 14 |
|
| 2 | [be] [verb] a [adj] contribution to | 14 |
|
| 3 | [be] make a [adj] contribution to | 12 |
|
| 4 | [be] [v-ing] a [adj] contribution to | 10 |
|
| 5 | [be] making a [adj] contribution to | 9 |
|
| 6 | is [verb] a [adj] contribution to | 8 |
|
| 7 | [is] [verb] a [adj] contribution to | 8 |
|
