| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun sg] [prep] a long period | 129 |
|
| 2 | [verb] [prep] a long period | 91 |
|
| 3 | [verb] [noun sg] [prep] a long | 44 |
|
| 4 | [verb] [noun sg] [prep] a period | 33 |
|
