| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [verb] [prep] a long period | 26 |
|
| 2 | be [verb] [prep] [art] long period | 26 |
|
| 3 | be [verb] [prep] a long period | 26 |
|
| 4 | be [vb pp] [prep] [art] long period | 23 |
|
| 5 | be [verb] over [art] long period | 14 |
|
| 6 | be [verb] for [art] long period | 7 |
|
| 7 | been [verb] [prep] [art] long period | 6 |
|
| 8 | was [verb] [prep] [art] long period | 6 |
|
