| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a first stage [prep] | 12 |
|
| 2 | [prep] a first stage [prep] | 12 |
|
| 3 | as a first stage [prep] | 11 |
|
| 4 | as a first stage [prep] | 11 |
|
| 5 | a first stage [prep] the | 6 |
|
| 6 | a first stage [prep] [art] | 6 |
|
| 7 | a first stage [prep] [art] | 6 |
|
| 8 | a first stage [prep] the | 6 |
|
