CONSIDERABLY
Etymology
Adverb
considerably (comparative more considerably, superlative most considerably)
Significantly; to a degree worth considering.
Source: Wiktionary
Con*sid"er*a*bly, adv.
Definition: In a manner or to a degree not trifling or unimportant;
greatly; much.
The breeds . . . differ considerably from each other. Darwin.
CONSIDERABLE
Con*sid"er*a*ble, a. Etym: [Cf. F. considérable.]
1. Worthy of consideration, borne in mind, or attended to.
It is considerable, that some urns have had inscriptions on them
expressing that the lamps were burning. Bp. Wilkins.
Eternity is infinitely the most considerable duration. Tillotson.
2. Of some distinction; noteworthy; influential; respectable; -- said
of persons.
You are, indeed, a very considerable man. Junius.
3. Of importance or value.
In painting, not every action, nor every person, is considerable
enough to enter into the cloth. Dryden.
A considerable sum of money. Prescott.
Source: Webster’s Unabridged Dictionary 1913 Edition