| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv prt] [prep] about half [art] hour | 7 |
|
| 2 | [adv prt] [prep] about half [art] hour | 7 |
|
| 3 | [adv prt] [prep] about half an hour | 7 |
|
| 4 | [adv prt] [prep] about half [art] hour | 7 |
|
| 5 | [adv prt] for about half [art] hour | 5 |
|
| 6 | [adv prt] for about half [art] hour | 5 |
|
