| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | a long period [prep] | 245 |
|
| 2 | a period [prep] [pron] | 97 |
|
| 3 | long period [prep] [pron] | 15 |
|
| 4 | a long period [pron] | 6 |
|
