| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb -s] [been] used for [det] year | 7 |
|
| 2 | [vb -s] [been] use for [det] years | 7 |
|
| 3 | has [been] use for [det] year | 7 |
|
| 4 | [vb -s] been use for [det] year | 7 |
|
| 5 | [vb -s] [been] use for many year | 7 |
|
