| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun sg] has been used [prep] a | 37 |
|
| 2 | [noun] has been used [prep] a | 36 |
|
| 3 | [noun] has been used as a | 34 |
|
| 4 | [noun] has been used [prep] an | 8 |
|
| 5 | [noun pl] has been used [prep] a | 5 |
|
