| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | serve as [noun] | 425 |
|
| 2 | serve as [noun sg] | 269 |
|
| 3 | [verb] as chairman | 90 |
|
| 4 | serve as chairman | 17 |
|
| 5 | serve as chairman | 16 |
|
| 6 | serve [prep] chairman | 16 |
|
| 7 | serve [prep] chairman | 16 |
|
