| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [art] long period | 16 |
|
| 2 | be a long period | 12 |
|
| 3 | be a long period | 12 |
|
| 4 | be [art] long period | 9 |
|
| 5 | was [art] long period | 7 |
|
| 6 | be [art] longer period | 5 |
|
