| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun sg] [prep] a long period | 129 |
|
| 2 | [noun sg] [prep] a long [conj] | 45 |
|
| 3 | [prep] a long period [conj] | 28 |
|
| 4 | [noun sg] [prep] a period [conj] | 15 |
|
