| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] be [num] years | 51 |
|
| 2 | to be [num] years | 46 |
|
| 3 | [prep] be [num] years | 46 |
|
| 4 | to be [num] years | 46 |
|
| 5 | [prep] be five years | 6 |
|
