| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | hold open [prep] | 12 |
|
| 2 | held open [prep] | 7 |
|
| 3 | hold open by | 5 |
|
| 4 | held open [prep] | 5 |
|
| 5 | hold open by | 5 |
|
