| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | has [verb] as a [noun] | 127 |
|
| 2 | has [vb pp] as a [noun] | 124 |
|
| 3 | have served as a [noun] | 37 |
|
| 4 | [verb] served as a [noun] | 37 |
|
| 5 | has served as [art] [noun] | 13 |
|
| 6 | has served as [art] [noun] | 13 |
|
| 7 | has serve as a [noun] | 12 |
|
| 8 | has served as a [noun] | 11 |
|
| 9 | has served [prep] a [noun] | 11 |
|
| 10 | has served [prep] a [noun] | 11 |
|
| 11 | [vb -s] served as a [noun] | 11 |
|
| 12 | has served as a [noun] | 11 |
|
