| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [been] [verb] [prep] [det] year | 138 |
|
| 2 | [been] [vb pp] [prep] [det] year | 101 |
|
| 3 | [been] used [prep] [det] [noun] | 67 |
|
| 4 | [been] used [prep] [adj] year | 21 |
|
| 5 | [be] used [prep] [det] year | 16 |
|
| 6 | [been] use [prep] [det] year | 14 |
|
