| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | keep up to date | 108 |
|
| 2 | kept up to [noun sg] | 39 |
|
| 3 | to keep up to [noun sg] | 21 |
|
| 4 | keeping up to [noun sg] | 19 |
|
| 5 | keep up to [noun sg] | 15 |
|
| 6 | keep up to [noun sg] | 8 |
|
| 7 | kept up to [noun sg] | 6 |
|
