| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a [noun] of [noun pl] | 16773 |
|
| 2 | [prep] [art] number of [noun pl] | 4960 |
|
| 3 | [prep] a number of [noun] | 3547 |
|
| 4 | [prep] a number [prep] [noun pl] | 3082 |
|
