| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun pl] [prep] a [adj] per cent | 45 |
|
| 2 | [noun] [prep] a 15 per cent | 13 |
|
| 3 | [noun pl] [prep] a 15 [unc] cent | 5 |
|
| 4 | [noun pl] [prep] a 15 per [unc] | 5 |
|
| 5 | [noun pl] [prep] [art] 15 per cent | 5 |
|
| 6 | [noun pl] [prep] a 15 per cent | 5 |
|
| 7 | [noun pl] [prep] [art] 15 per cent | 5 |
|
