| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun sg] [prep] [art] period [prep] | 868 |
|
| 2 | [prep] [art] long period [prep] | 208 |
|
| 3 | [noun sg] [prep] [art] long period | 138 |
|
| 4 | [noun sg] [prep] long period [prep] | 32 |
|
