| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [vb base] been send [prep] [noun] | 21 |
|
| 2 | letter [verb] been send [prep] [noun] | 10 |
|
| 3 | letter [vb base] been [verb] [prep] [noun] | 8 |
|
| 4 | letter [vb base] [be] send [prep] [noun] | 6 |
|
| 5 | letter [vb base] be send [prep] [noun] | 6 |
|
| 6 | letter [vb base] [been] send [prep] [noun] | 6 |
|
