| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | a number of [noun] of | 416 |
|
| 2 | a number of [noun pl] of | 404 |
|
| 3 | a [noun] of groups of | 9 |
|
| 4 | a number of groups [prep] | 7 |
|
| 5 | a number of groups [prep] | 7 |
|
| 6 | [art] number of groups of | 5 |
|
| 7 | a number of group of | 5 |
|
| 8 | a number [prep] groups of | 5 |
|
| 9 | a number of groups of | 5 |
|
| 10 | a number [prep] groups of | 5 |
|
| 11 | a number of groups of | 5 |
|
