| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [verb] half [art] hour | 10 |
|
| 2 | it [verb] half an hour | 10 |
|
| 3 | it [verb] half [art] hour | 10 |
|
| 4 | it take half [art] hour | 9 |
|
| 5 | it takes half [art] hour | 5 |
|
| 6 | it [vb -s] half [art] hour | 5 |
|
| 7 | it [vb past] half [art] hour | 5 |
|
