| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a period of [noun sg] | 452 |
|
| 2 | [prep] a period of time | 239 |
|
| 3 | over a period of [noun sg] | 186 |
|
| 4 | over a period of [noun sg] | 186 |
|
| 5 | after a period of [noun sg] | 55 |
|
| 6 | after a period of [noun sg] | 55 |
|
| 7 | for a period of [noun sg] | 50 |
|
| 8 | for a period of [noun sg] | 50 |
|
| 9 | in a period of [noun sg] | 38 |
|
| 10 | in a period of [noun sg] | 38 |
|
| 11 | during a period of [noun sg] | 19 |
|
| 12 | during a period of [noun sg] | 19 |
|
| 13 | of a period of [noun sg] | 16 |
|
| 14 | of a period of [noun sg] | 16 |
|
| 15 | as a period of [noun sg] | 16 |
|
| 16 | as a period of [noun sg] | 16 |
|
| 17 | by a period of [noun sg] | 15 |
|
| 18 | to a period of [noun sg] | 15 |
|
| 19 | to a period of [noun sg] | 15 |
|
| 20 | by a period of [noun sg] | 15 |
|
| 21 | through a period of [noun sg] | 12 |
|
| 22 | through a period of [noun sg] | 12 |
|
| 23 | with a period of [noun sg] | 10 |
|
| 24 | with a period of [noun sg] | 10 |
|
| 25 | [prep] a period of transition | 10 |
|
| 26 | [prep] a period of inflation | 9 |
|
| 27 | [prep] a period of change | 7 |
|
| 28 | from a period of [noun sg] | 7 |
|
| 29 | from a period of [noun sg] | 7 |
|
| 30 | [prep] a period of consolidation | 6 |
|
