| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] a quota system | 6 |
|
| 2 | a [adj] quota system | 6 |
|
| 3 | a [adj] quota system | 6 |
|
| 4 | a quota system [prep] | 6 |
|
| 5 | a quota system [prep] | 6 |
|
