| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] used [prep] [det] purpose | 56 |
|
| 2 | [be] used [prep] the [det] | 49 |
|
| 3 | [be] used [prep] the purpose | 14 |
|
| 4 | used [prep] the [det] purpose | 10 |
|
