| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [been] used [prep] [adj] years | 21 |
|
| 2 | been used [prep] [adj] year | 21 |
|
| 3 | [been] used [prep] [adj] year | 21 |
|
| 4 | [been] used for [adj] year | 15 |
|
| 5 | [been] used for [adj] year | 15 |
|
| 6 | [been] used [prep] [det] year | 14 |
|
| 7 | [been] used [prep] many year | 12 |
|
| 8 | [been] used [prep] many year | 12 |
|
| 9 | [been] used in [adj] year | 5 |
|
| 10 | [been] used [prep] [adj] year | 5 |
|
| 11 | [been] used in [adj] year | 5 |
|
