| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | had been a [n mass] [prep] | 10 |
|
| 2 | [vb past] been a [n mass] [prep] | 10 |
|
| 3 | [vb past] been a [n mass] of | 8 |
|
| 4 | [vb past] been a [n mass] of | 8 |
|
| 5 | [vb past] been a series [prep] | 6 |
|
