| Share | Phrase |
| 7.65% | complicate construction [perform operation] |
| 6.70% | complicate structure [perform operation] |
| 6.13% | complicate design [perform operation] |
| 5.14% | unduly [degree] complicate |
| 4.99% | variation [location] complicate |
| 4.76% | complicate system [perform operation] |
| 3.85% | fact [does] complicate |
| 3.58% | too [degree] complicate |
| 3.33% | quite [degree] complicate |
| 3.00% | complicate process [perform operation] |
| 2.99% | relatively [degree] complicate |
| 2.71% | complicate in construction |
| 2.57% | complicate task [perform operation] |
| 2.44% | more [degree] complicate |
| 2.27% | complicate mechanism [perform operation] |
| 2.12% | complicate installation [perform operation] |
| 1.92% | shape [location] complicate |
| 1.87% | structurally [manner] complicate |
| 1.83% | complicate device [perform operation] |
| 1.66% | complicate problem [perform operation] |
| 1.65% | extremely [degree] complicate |
| 1.65% | complicate arrangement [perform operation] |
| 1.57% | complicate control [perform operation] |
| 1.56% | complicate procedure [perform operation] |
| 1.45% | complicate operation [perform operation] |
| 1.32% | need [does] complicate |
| 1.30% | less [degree] complicate |
| 1.28% | complicate apparatus [perform operation] |
| 1.26% | use [does] complicate |
| 1.22% | complicate it [perform operation] |
| 1.20% | complicate disadvantage [perform operation] |
| 1.14% | complicate assembly [perform operation] |
| 1.12% | complicate modal would |
| 1.10% | complicate configuration [perform operation] |
| 0.99% | so [degree] complicate |
| 0.96% | complicate engine [perform operation] |
| 0.88% | complicate circuit [perform operation] |
| 0.81% | addition [addition] complicate |
| 0.80% | not complicate |
| 0.73% | particularly [degree] complicate |
| 0.71% | complicate valve [perform operation] |
| 0.50% | complicate modal may |
| 0.48% | system [does] complicate |
| 0.47% | generally [resume] complicate |
| 0.45% | complicate in case |
| 0.45% | engine complicate |
| 0.44% | complicate modal will |
| 0.42% | only [degree] complicate |
| 0.33% | complicate modal can |