| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be used at the | 21 |
|
| 2 | being used at the | 7 |
|
| 3 | is used at the | 7 |
|
| 4 | been used at the | 6 |
|
| 5 | was used at the | 5 |
|
