| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [be] used in | 318 |
|
| 2 | [is] [prep] [be] used | 143 |
|
| 3 | [is] [prep] [be] in | 75 |
|
| 4 | [is] [be] used in | 35 |
|
