| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [v-ing] a [noun] | 49708 |
|
| 2 | a [noun] [letter] | 1412 |
|
| 3 | [v-ing] [noun] [letter] | 280 |
|
| 4 | [v-ing] a [letter] | 64 |
|
