| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] been [vb pp] for [det] [noun pl] | 31 |
|
| 2 | had [been] [vb pp] for [det] [noun pl] | 31 |
|
| 3 | [vb past] [been] [vb pp] for [det] years | 18 |
|
| 4 | [vb past] [been] [vb pp] for many [noun pl] | 14 |
|
| 5 | [vb past] [been] [vb pp] for several [noun pl] | 7 |
|
| 6 | [vb past] [been] [vb pp] for some [noun pl] | 6 |
|
