"considerable deviation" is correct and usable in written English.
You can use it in a sentence to describe the amount of difference from the expected, such as: "The results of the experiment showed a considerable deviation from our expected outcome."
A considerable deviation was also observed in luciferase activity measurements (Figure 2d).
However, the methodologies developed show considerable deviation between the Marsh funnel results and other standard viscometer devices.
A considerable deviation is found between the prediction by existing design-oriented confinement models and test results.
The solution shows that there is a considerable deviation between the exact solution and the simple quasi-steady solution.
In this paper, we show that changes to the original plan induced by a disruption may impose considerable deviation costs throughout the system.
Especially in higher hydrogen sulfide content in spite of ANN good predictions there was considerable deviation between experimental data and common correlations.
The experimental time series, however, can be characterized by considerable deviations from independent stationary Poisson processes.
Considerable deviations (i.e., around 20%) were observed in seepage gradients under this scenario.
At lower pressures considerable deviations from the expected linear behavior can be found.
On the other hand, some paintings such as Rafael's "School of Athens" shown below, while using perspective projection, contain considerable deviations from it.
In many cases they are made with considerable deviations from specifications, violations of the engineering construction technology, etc.
