| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [been] [verb] for [adj] year | 309 |
|
| 2 | [verb] [been] [vb pp] for [adj] year | 169 |
|
| 3 | [verb] [been] used for [adj] [noun] | 44 |
|
| 4 | [verb] [been] used [prep] [adj] year | 15 |
|
| 5 | [verb] [been] used [prep] [adj] year | 15 |
|
| 6 | [verb] [been] use for [adj] year | 13 |
|
| 7 | [verb] [be] used for [adj] year | 12 |
|
| 8 | [verb] [been] used for [adj] year | 12 |
|
