| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | period [prep] five year | 51 |
|
| 2 | period [prep] five years | 51 |
|
| 3 | period of five year | 50 |
|
| 4 | period of five year | 50 |
|
| 5 | period [prep] five year | 48 |
|
