| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adj] [prep] a period | 97 |
|
| 2 | [adj] [prep] a period | 60 |
|
| 3 | [adj] over a period | 29 |
|
| 4 | [adj] for a period | 26 |
|
| 5 | [num] [prep] a period | 21 |
|
| 6 | [det] [prep] a period | 13 |
|
| 7 | [adj] during a period | 10 |
|
| 8 | [adj] after a period | 9 |
|
| 9 | [adj] in a period | 9 |
|
| 10 | that [prep] a period | 7 |
|
| 11 | that [prep] a period | 7 |
|
