| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | had been [adj] for several [noun] | 8 |
|
| 2 | had [been] [adj] for several [noun pl] | 8 |
|
| 3 | had [been] [adj] for several years | 5 |
|
| 4 | had [been] [adj] for several year | 5 |
|
