| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [is] [adv] used for | 148 |
|
| 2 | [is] [adv] for a | 121 |
|
| 3 | [adv] used for a | 12 |
|
| 4 | [is] used for a | 10 |
|
