| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been used [prep] [adj] years | 15 |
|
| 2 | have been use for [adj] years | 13 |
|
| 3 | have been use [prep] [det] years | 12 |
|
| 4 | have been use [prep] many years | 11 |
|
| 5 | have been use [prep] many years | 11 |
|
| 6 | has been use [prep] [adj] years | 8 |
|
