| Share | Phrase |
| 18.04% | observe it [perform operation] |
| 6.64% | observer [does] observe |
| 4.62% | observe modal will |
| 3.23% | observe modal can |
| 2.81% | observe turbidity [perform operation] |
| 2.81% | observe state [perform operation] |
| 2.65% | observe by equation |
| 2.52% | visually [manner] observe |
| 1.84% | observe modal should |
| 1.76% | observe tendency [perform operation] |
| 1.55% | observe peak [perform operation] |
| 1.50% | observe improvement [perform operation] |
| 1.49% | observe modal may |
| 1.49% | observe [temporal] stand |
| 1.40% | observe precipitate [perform operation] |
| 1.33% | operator [does] observe |
| 1.30% | monitor by observe |
| 1.26% | readily [degree] observe |
| 1.25% | observe gauge [perform operation] |
| 1.18% | observe trace [perform operation] |
| 1.15% | observe at concentration |
| 1.13% | observe response [perform operation] |
| 1.11% | view [location] observe |
| 1.11% | filter [attribute] observe |
| 1.06% | observe interior [perform operation] |
| 1.01% | observe condition [perform operation] |
| 1.00% | observe in equation |
| 1.00% | observe characteristic [perform operation] |
| 0.99% | observe variable [perform operation] |
| 0.99% | observe behavior [perform operation] |
| 0.94% | observe flame [perform operation] |
| 0.90% | observe view [perform operation] |
| 0.88% | filter in observe |
| 0.88% | observe phenomenon [perform operation] |
| 0.86% | observe effect [perform operation] |
| 0.86% | observe soot [perform operation] |
| 0.85% | observe temperature [perform operation] |
| 0.77% | observe ratio [perform operation] |
| 0.76% | observe change [perform operation] |
| 0.74% | observe rate [perform operation] |
| 0.70% | observe phase [perform operation] |
| 0.70% | observe reading [perform operation] |
| 0.69% | observe increase [perform operation] |
| 0.66% | determine by observe |
| 0.66% | observe pressure [perform operation] |
| 0.63% | not observe |
| 0.63% | observe indicator [perform operation] |
| 0.62% | observe [temporal] continue |
| 0.61% | observe product [perform operation] |
| 0.61% | method [does] observe |
| 0.58% | observe in case |
| 0.54% | often [temporal] observe |
| 0.54% | observe variation [perform operation] |
| 0.53% | observe signal [perform operation] |
| 0.52% | observe surface [perform operation] |
| 0.52% | point [location] observe |
| 0.52% | typically [typicality] observe |
| 0.51% | easily [manner] observe |
| 0.49% | operation [temporal] observe |
| 0.48% | driver [does] observe |
| 0.47% | observe magnitude [perform operation] |
| 0.47% | direction [location] observe |
| 0.46% | circuit [does] observe |
| 0.43% | observe operation [perform operation] |
| 0.42% | sensor [does] observe |
| 0.41% | observe relationship [perform operation] |
| 0.40% | observe angle [perform operation] |
| 0.38% | observe difference [perform operation] |
| 0.35% | observe time [perform operation] |
| 0.32% | observe modal would |
| 0.32% | time [temporal] observe |
| 0.32% | addition [addition] observe |
| 0.31% | side [location] observe |
| 0.31% | observe oil [perform operation] |
| 0.31% | observe modal must |
| 0.30% | means [does] observe |
| 0.28% | possible to observe |
| 0.27% | portion observe |
| 0.26% | observe chamber [perform operation] |
| 0.25% | observe flow [perform operation] |
| 0.25% | observe system [perform operation] |
| 0.24% | observe means [perform operation] |
| 0.23% | observe engine [perform operation] |
| 0.22% | example [example] observe |
| 0.20% | observe fuel [perform operation] |