| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [v-ing] [prep] an [noun] | 2214 |
|
| 2 | [been] [v-ing] [prep] [noun] | 1487 |
|
| 3 | [been] [v-ing] [prep] an | 83 |
|
| 4 | [been] [v-ing] an [noun] | 78 |
|
| 5 | [been] [prep] an [noun] | 62 |
|
