| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | had [been] [verb] for | 1516 |
|
| 2 | had [been] [v-ing] for | 496 |
|
| 3 | have [been] waiting for | 236 |
|
| 4 | [verb] [been] waiting for | 236 |
|
| 5 | [vb past] [been] waiting for | 100 |
|
| 6 | had [been] waiting [prep] | 95 |
|
| 7 | had [been] waiting [prep] | 95 |
|
| 8 | had [be] waiting for | 82 |
|
| 9 | had [been] wait for | 82 |
|
| 10 | had [been] waiting for | 82 |
|
