| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [vb pp] [prep] [num] years | 754 |
|
| 2 | [vb pp] [prep] [num] years ' | 117 |
|
| 3 | be [prep] [num] years ' | 59 |
|
| 4 | be [vb pp] [num] years ' | 7 |
|
