| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | has worked [prep] a number [prep] | 5 |
|
| 2 | has worked [prep] a number of | 5 |
|
| 3 | has worked [prep] a number of | 5 |
|
| 4 | has worked [prep] a number [prep] | 5 |
|
