| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [v-ing] for a | 4459 |
|
| 2 | [been] [v-ing] for | 1734 |
|
| 3 | [been] [v-ing] a | 862 |
|
| 4 | [been] for a | 96 |
|
