| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | served [prep] a [noun sg] | 230 |
|
| 2 | has [prep] a [noun sg] | 39 |
|
| 3 | has served [prep] a | 14 |
|
| 4 | has served [prep] [noun sg] | 10 |
|
