| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | less than [art] rate of | 8 |
|
| 2 | less [subord] [art] rate of | 8 |
|
| 3 | less [subord] [art] rate of | 8 |
|
| 4 | less [subord] the rate of | 8 |
|
