| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [was/were] [v-ing] [num] years | 18 |
|
| 2 | was [v-ing] [adj] years | 14 |
|
| 3 | were [v-ing] [adj] years | 7 |
|
| 4 | [was/were] serving [adj] years | 6 |
|
