| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb base] [verb] to | 7560 |
|
| 2 | [verb] contribute to | 593 |
|
| 3 | [vb base] contribute [prep] | 150 |
|
| 4 | [vb base] contribute [prep] | 150 |
|
| 5 | [vb base] contribute to | 134 |
|
