| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] a period of | 82 |
|
| 2 | [noun sg] [conj] a period | 15 |
|
| 3 | [noun sg] a period of | 13 |
|
| 4 | [noun sg] [conj] period of | 10 |
|
