| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | as a first step | 87 |
|
| 2 | as a first stage | 16 |
|
| 3 | as a first course | 5 |
|
| 4 | as a first resort | 5 |
|
| 5 | as a first approximation | 5 |
|
