| Share | Phrase |
|---|
| 14.11% | pore blockage |
| 11.85% | wax blockage |
| 11.25% | varying [time periodicity] blockage |
| 6.77% | movement blockage |
| 6.62% | blockage [does] occur |
| 6.31% | release blockage [perform operation] |
| 5.96% | partial [completeness] blockage |
| 5.21% | line blockage |
| 4.63% | effect blockage [perform operation] |
| 4.27% | port blockage |
| 4.25% | blockage [does] cause |
| 3.95% | cause blockage [perform operation] |
| 3.81% | prevent blockage [perform operation] |
| 3.54% | flow blockage |
| 2.57% | air blockage |
| 2.46% | provide blockage [perform operation] |
| 2.36% | fuel blockage |