| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | a [noun] to [noun] | 6941 |
|
| 2 | a letter [prep] [noun] | 837 |
|
| 3 | a letter [prep] [noun] | 837 |
|
| 4 | [art] letter to [noun] | 338 |
|
| 5 | a letter to [noun] | 273 |
|
