| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [been] [v-ing] on [prep] | 237 |
|
| 2 | [been] [v-ing] on [prep] | 237 |
|
| 3 | [be] [v-ing] on at | 102 |
|
| 4 | [been] [v-ing] [adv] at | 76 |
|
| 5 | [been] [verb] on at | 18 |
|
| 6 | [been] [v-ing] on at | 11 |
|
