| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | long [art] period [prep] | 7 |
|
| 2 | long a period [prep] | 7 |
|
| 3 | long a period [prep] | 7 |
|
| 4 | long [art] period [prep] | 7 |
|
| 5 | long [art] period of | 6 |
|
