| Share | Phrase |
| 30.73% | constraint index |
| 14.85% | packaging [purpose] constraint |
| 6.99% | space constraint |
| 6.13% | impose constraint [perform operation] |
| 5.17% | design constraint |
| 4.87% | packaging [purpose] constraint |
| 3.12% | physical [domain related] constraint |
| 2.87% | dimensional [size] constraint |
| 2.75% | constraint [does] limit |
| 2.54% | size constraint |
| 2.38% | fit within constraint |
| 2.17% | tight [tightness] constraint |
| 1.87% | structural [structure] constraint |
| 1.74% | subject to constraint |
| 1.63% | constraint bar |
| 1.58% | constraint system |
| 1.26% | mechanical [functioning] constraint |
| 0.98% | provide constraint [perform operation] |
| 0.94% | vehicle constraint |
| 0.89% | temperature constraint |
| 0.75% | constraint [does] produce |
| 0.74% | have constraint [perform operation] |
| 0.68% | flow constraint |
| 0.55% | system constraint |
| 0.48% | comprise constraint [perform operation] |
| 0.47% | not constraint |
| 0.46% | engine constraint |
| 0.27% | constraint means |