| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] been part of | 72 |
|
| 2 | [vb past] been part of | 72 |
|
| 3 | [vb past] been part [prep] | 72 |
|
| 4 | had been part [prep] | 70 |
|
