| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | was [verb] [prep] a [adj] period | 24 |
|
| 2 | was [vb pp] [prep] a [adj] period | 20 |
|
| 3 | was [verb] for a [adj] period | 9 |
|
| 4 | was [verb] [prep] a long period | 6 |
|
| 5 | was [verb] [prep] a long period | 6 |
|
| 6 | was [verb] over a [adj] period | 5 |
|
