| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | that a period [prep] | 9 |
|
| 2 | that a period [prep] | 9 |
|
| 3 | that a period of | 8 |
|
| 4 | that a period of | 8 |
|
| 5 | [verb] that a period | 8 |
|
| 6 | that [prep] a period | 20 |
|
| 7 | that [prep] a period | 20 |
|
| 8 | that over a period | 6 |
|
| 9 | that over a period | 6 |
|
| 10 | that a [adj] period | 15 |
|
| 11 | that a [adj] period | 11 |
|
| 12 | that a long period | 5 |
|
