| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | to [det] period [prep] | 13 |
|
| 2 | to [det] period [prep] | 13 |
|
| 3 | to this period [prep] | 5 |
|
| 4 | to [det] period of | 5 |
|
| 5 | to [det] period of | 5 |
|
| 6 | to any period [prep] | 5 |
|
