| Share | Phrase |
|---|
| 11.77% | have perforation [perform operation] |
| 10.79% | perforation hole |
| 7.86% | perforation row |
| 7.12% | aligned [shape] perforation |
| 6.99% | multiplicity perforation |
| 6.44% | plurality perforation |
| 4.70% | perforation plurality |
| 4.50% | perforation opening |
| 3.77% | perforation [does] allow |
| 3.52% | perforation pattern |
| 3.44% | form perforation [perform operation] |
| 3.35% | central [location] perforation |
| 3.27% | surround perforation [perform operation] |
| 3.26% | perforation processing |
| 3.09% | perforation series |
| 2.54% | perforation area |
| 2.39% | perforation number |
| 2.05% | perforation arrangement |
| 1.84% | include perforation [perform operation] |
| 1.53% | perforation [does] extend |
| 1.42% | perforation [does] form |
| 1.42% | show perforation [perform operation] |
| 1.11% | provide perforation [perform operation] |
| 0.89% | perforation [does] have |
| 0.81% | not perforation |