| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | a [det] hours before [art] [noun sg] | 7 |
|
| 2 | a [adj] hours before [art] [noun sg] | 7 |
|
| 3 | a [adj] hours before the [noun sg] | 7 |
|
| 4 | a few hours before [art] [noun sg] | 5 |
|
| 5 | a few hours before [art] [noun sg] | 5 |
|
