| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [been] used [prep] [adj] | 269 |
|
| 2 | [been] [prep] [adj] year | 74 |
|
| 3 | used [prep] [adj] year | 38 |
|
| 4 | [been] used [prep] year | 10 |
|
