The phrase "as a considerable portion" is correct and usable in written English.
It can be used when discussing a significant part or amount of something in a formal or academic context.
Example: "As a considerable portion of the budget is allocated to research and development, we must ensure that these funds are used effectively."
Alternatives: "as a significant part" or "as a large segment".
In 2012, as a considerable portion of the American reading public now knows, the Columbia undergraduates Emma Sulkowicz and Paul Nungesser had a disputed sexual encounter in her dorm room.
The real number of prey categories was most likely higher, as a considerable portion (10%) of the stomach contents was too digested to identify the prey.
This positive correlation may be caused by the HIV 'iceberg phenomenon', 35 where the numbers of people reported and identified as infected with HIV are only the 'tip of the iceberg', as a considerable portion may have not been detected or may have become recessive cases.
As indicated, a considerable portion of land in Tehran and Shariar plains is devoted to agriculture because the area is covered by organic soils.
They plan on nuclear power to supply a considerable portion, as much as a third.
They also lost a considerable portion of their remaining jets as well as their Falklands-based helicopters and light ground-attack planes.
Surprisingly, they managed to wrangle a considerable portion of the 1960s Brady clan as well as actors from later Brady incarnations.
As shown in Fig. 3, a considerable portion of the CLLL process is unnecessary in the context of MIMO detection with the LR-aided FSD, especially at high E b /N o values.
As one would expect, Tarrant devotes a considerable portion of his introduction to the final scene and presents a balanced and sober discussion of the controversy surrounding Aeneas' killing of Turnus, arguing for deliberate ambivalence on the part of Vergil.
Closely located mutations on the same DNA molecule are linked together forming haplotypes that are inherited as whole units and span over a considerable portion of a gene or several neighboring genes (Consortium 2005).
This lack of information is problematic as roots in forests make up a considerable portion of terrestrial productivity (i.e., 2 5 kg·m−2; Jackson et al., 1996), drive community composition by competing for soil resources (Casper and Jackson, 1997; Cahill and McNickle, 2011), and contribute to forest succession from soil bud banks (Bobowski et al., 1999).
