| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | a [noun] of [prep] | 709 |
|
| 2 | a [noun] rate [prep] | 301 |
|
| 3 | a [noun] rate of | 249 |
|
| 4 | [noun] rate of [prep] | 15 |
|
| 5 | a rate of [prep] | 12 |
|
