| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which [was/were] [verb] [adj] years | 23 |
|
| 2 | which [was/were] [vb pp] [adj] years | 21 |
|
| 3 | which was [verb] [adj] years | 17 |
|
| 4 | which [was/were] [verb] [num] years | 13 |
|
| 5 | which [was/were] [verb] [det] years | 10 |
|
| 6 | which were [verb] [adj] years | 6 |
|
| 7 | which [was/were] [verb] several years | 5 |
|
| 8 | which [was/were] [verb] several years | 5 |
|
