| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | has been used [prep] a [noun sg] | 47 |
|
| 2 | has been used as a [noun] | 36 |
|
| 3 | has been used [prep] a number | 7 |
|
| 4 | has been used [prep] a number | 7 |
|
