| Share | Phrase |
|---|
| 36.35% | customary [time periodicity] it |
| 18.17% | customary [time periodicity] practice |
| 13.95% | customary [time periodicity] manner |
| 4.78% | customary [time periodicity] way |
| 4.58% | customary [time periodicity] system |
| 3.50% | customary [time periodicity] fashion |
| 3.11% | customary [time periodicity] construction |
| 2.82% | customary [time periodicity] type |
| 2.82% | customary to provide |
| 2.62% | customary [time periodicity] travel |
| 2.53% | customary [time periodicity] engine |
| 2.30% | customary [time periodicity] become |
| 1.69% | customary [time periodicity] valve |
| 0.71% | customary in system |