The phrase "as considerable time" is not correct in written English.
It is likely intended to convey a sense of a significant duration but is not a standard expression.
Example: "We need to allocate as considerable time as possible for this project to ensure its success."
Alternatives: "a significant amount of time" or "a considerable amount of time."
You may find you've made a significant investment, such as considerable time or an up-front payment, before you've agreed on a deal.
Indirect, or nonkinetic, operations require a great deal of patience to conduct, as considerable time can elapse before their effects are noticeable.
Embryo cryopreservation has a pregnancy rate of 15 25%, but as considerable time is required to obtain mature follicles chemotherapy administration may be delayed with potential detrimental effect on patient outcome.
The politics of energy oil, gas, nuclear power are world politics (just as, for some considerable time, military strategy has been world strategy).
Alter shrewdly reads this achievement as a matter of style as much as substance, and spends considerable time examining the subtle ways in which F.D.R. embodied hope to a people consumed by despair.
Noting that both Diana and the Duchess of York, Sarah Ferguson (known as Fergie), spent considerable time in New York and considered making it their home, Dr. Swift added, "It's a place where they can live a more relaxed lifestyle, where they're not treated with such formality".
The significance of the Mussel Slough myth in the history of California and the Southern Pacific Railroad is evident from a quote by Theodore Roosevelt, who as president focused considerable time and energy in redressing the wrongs and abuses of corporate monopolies throughout the U.S.
As such, a considerable time has been spent discussing the protocol and instruments with clinician stakeholders and the user group, who have advised on feasibility and acceptability.
As with students, the incentive for faculty members to work together must be very strong; that is, they must have clear group goals and perceive the communal effort, combined expertise, and mutual support as worth the considerable time and effort.
Her main base is Paris but she spends considerable time in Berlin as well as England, Spain, Italy and Japan.
Accomplishing these intermediate goals would require considerable time and energy as well as a degree of good fortune.
