| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | but at a [noun sg] | 72 |
|
| 2 | but at a time | 11 |
|
| 3 | but at a time | 11 |
|
| 4 | but at a price | 11 |
|
| 5 | but at a price | 11 |
|
| 6 | but at a cost | 10 |
|
| 7 | but at a cost | 10 |
|
