| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | been used [prep] many [noun] | 18 |
|
| 2 | been used [prep] many [noun pl] | 17 |
|
| 3 | been used for many [noun] | 13 |
|
| 4 | been used [prep] many year | 12 |
|
| 5 | been used [prep] many years | 12 |
|
