| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun prp] [be] [verb] [prep] a period | 10 |
|
| 2 | [noun prp] be [verb] [prep] a period | 10 |
|
| 3 | [noun prp] [was/were] [verb] [prep] a period | 8 |
|
| 4 | [noun prp] was [verb] [prep] a period | 8 |
|
| 5 | [noun prp] [verb] [prep] a [adj] period | 5 |
|
| 6 | [noun prp] [verb] [prep] a [adj] period | 5 |
|
| 7 | [noun prp] [verb] [prep] a period of | 12 |
|
| 8 | [noun prp] [verb] [prep] a period [prep] | 12 |
|
| 9 | [noun prp] [verb] [prep] a period of | 12 |
|
| 10 | [noun prp] [verb] [prep] a period [prep] | 12 |
|
