| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | the expiry [prep] [art] period | 9 |
|
| 2 | the expiry of [art] period | 9 |
|
| 3 | the expiry [prep] the period | 7 |
|
| 4 | the expiry [prep] the period | 7 |
|
