| Share | Phrase |
|---|
| 15.83% | restricted [size] opening |
| 14.13% | restricted [size] passage |
| 11.82% | restricted [size] orifice |
| 9.84% | restricted [size] flow |
| 5.21% | restricted [size] portion |
| 4.81% | restricted [size] communication |
| 2.93% | restricted [size] passageway |
| 2.88% | restricted [size] area |
| 2.76% | restricted [size] region |
| 2.63% | restricted [size] rate |
| 2.55% | restricted [size] means |
| 2.35% | restricted [size] path |
| 2.16% | restricted [size] position |
| 2.13% | restricted [size] space |
| 2.04% | restricted [size] mode |
| 1.72% | restricted [size] outlet |
| 1.06% | restricted [size] bore |
| 0.87% | restricted [size] connection |
| 0.85% | restricted [size] end |
| 0.79% | restricted [size] range |
| 0.75% | restricted [size] gap |
| 0.75% | restricted [size] diameter |
| 0.72% | restricted [size] port |
| 0.71% | restricted [size] line |
| 0.70% | restricted [size] throat |
| 0.69% | restricted [size] condition |
| 0.63% | restricted [size] section |
| 0.63% | restricted [size] size |
| 0.60% | restricted [size] movement |
| 0.58% | restricted [size] conduit |
| 0.55% | restricted [size] communicating |
| 0.52% | restricted [size] system |
| 0.51% | restricted [size] duct |
| 0.51% | restricted [size] fitting |
| 0.51% | restricted [size] inlet |
| 0.40% | restricted [size] supply |
| 0.38% | restricted [size] amount |
| 0.31% | only [degree] restricted |