| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] for a | 6949 |
|
| 2 | [adv] [v-ing] a | 5515 |
|
| 3 | [v-ing] for a | 4459 |
|
| 4 | [adv] [v-ing] for | 3110 |
|
