| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] vary [prep] time | 16 |
|
| 2 | [modal v] vary [prep] time | 16 |
|
| 3 | [modal v] vary from time | 11 |
|
| 4 | will vary [prep] time | 9 |
|
| 5 | will vary [prep] time | 9 |
|
| 6 | may vary [prep] time | 5 |
|
| 7 | may vary [prep] time | 5 |
|
