| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | at an annual [noun sg] | 86 |
|
| 2 | [v-ing] at an [noun sg] | 63 |
|
| 3 | [v-ing] an annual [noun sg] | 43 |
|
| 4 | [v-ing] at an annual | 17 |
|
