| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [been] use [prep] [adj] [noun] | 204 |
|
| 2 | [been] [verb] [prep] [adj] study | 64 |
|
| 3 | [be] use [prep] [adj] study | 17 |
|
| 4 | [been] use [prep] [adj] study | 6 |
|
