| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [noun sg] at an early [noun sg] | 15 |
|
| 2 | [verb] [noun sg] at a early [noun sg] | 10 |
|
| 3 | [verb] [noun sg] at a early stage | 9 |
|
| 4 | [v-ing] [noun sg] at a early [noun sg] | 5 |
|
| 5 | [verb] [noun sg] at a earlier [noun sg] | 5 |
|
