| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | been used [prep] [num] [prep] | 10 |
|
| 2 | been used [prep] [num] of | 7 |
|
| 3 | been used [prep] [num] of | 7 |
|
| 4 | been used for [num] [prep] | 5 |
|
