| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | if [adv] require | 20 |
|
| 2 | if [adv] required | 18 |
|
| 3 | if so require | 17 |
|
| 4 | if so require | 17 |
|
| 5 | if [adv] require | 17 |
|
