| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | when [art] number of | 33 |
|
| 2 | when [art] number of | 33 |
|
| 3 | when [art] number of | 31 |
|
| 4 | when the number of | 20 |
|
| 5 | when a number of | 13 |
|
