1.  bit by bit(r = adv.all) in stages, little by little, piecemeal - a little bit at a time; "the research structure has developed piecemeal"

2.  bit by bit(r = adv.all) gradually, step by step - in a gradual manner; "the snake moved gradually toward its victim"

N  degree, grade, extent, measure, amount, ratio, stint, standard, height, pitch, reach, amplitude, range, scope, caliber, gradation, shade, tenor, compass, sphere, station, rank, standing, rate, way, sort, point, mark, stage, intensity, strength, comparative, gradual, shading off, within the bounds, by degrees, gradually, inasmuch, pro tanto, however, howsoever, step by step, bit by bit, little by little, inch by inch, drop by drop, a little at a time, by inches, by slow degrees, by degrees, by little and little, in some degree, in some measure, to some extent, di grado in grado.

N  part, portion, dose, item, particular, aught, any, division, ward, subdivision, section, chapter, clause, count, paragraph, verse, article, passage, sector, segment, fraction, fragment, cantle, frustum, detachment, parcel, piece, lump, bit cut, cutting, chip, chunk, collop, slice, scale, lamina, small part, morsel, particle, installment, dividend, share, debris, odds and ends, oddments, detritus, excerpta, member, limb, lobe, lobule, arm, wing, scion, branch, bough, joint, link, offshoot, ramification, twig, bush, spray, sprig, runner, leaf, leaflet, stump, component part, sarmentum, compartment, department, county, fractional, fragmentary, sectional, aliquot, divided, in compartments, multifid, disconnected, partial, partly, in part, partially, piecemeal, part by part, by by installments, by snatches, by inches, by driblets, bit by bit, inch by inch, foot by foot, drop by drop, in detail, in lots.

N  speciality, specialite, individuality, individuity, particularity, peculiarity, idiocrasy, personality, characteristic, mannerism, idiosyncrasy, specificness, singularity, reading, version, lection, state, trait, distinctive feature, technicality, differentia, particulars, details, items, counts, minutiae, I, self, I myself, myself, himself, herself, itself, special, particular, individual, specific, proper, personal, original, private, respective, definite, determinate, especial, certain, esoteric, endemic, partial, party, peculiar, appropriate, several, characteristic, diagnostic, exclusive, singular, idiomatic, idiotypical, typical, this, that, yon, yonder, specially, especially, particularly, in particular, in propria persona, ad hominem, for my part, each, apiece, one by one, one at a time, severally, respectively, each to each, seriatim, in detail, in great detail, in excruciating detail, in mind-numbing detail, bit by bit, pro hac vice, pro re nata, namely, that is to say, for example, id est, exemplia gratia, e, g, i, e, videlicet, viz, to wit, le style est l'homme meme.

N  slowness, languor, drawl, creeping, lentor, retardation, slackening, delay, claudication, jog trot, dog trot, mincing steps, slow march, slow time, slow goer, slow coach, slow back, lingerer, loiterer, sluggard, tortoise, snail, poke, dawdle, slow, slack, tardy, dilatory, gentle, easy, leisurely, deliberate, gradual, insensible, imperceptible, glacial, languid, sluggish, slow paced, tardigrade, snail-like, creeping, reptatorial, slowly, leisurely, piano, adagio, largo, larghetto, at half speed, under easy sail, at a foots pace, at a snail's pace, at a funeral pace, in slow time, with mincing steps, with clipped wings, haud passibus aequis, gradually, gradatim, by degrees, by slow degrees, by inches, by little and little, step by step, one step at a time, inch by inch, bit by bit, little by little, seriatim, consecutively, dum Roma deliberat Saguntum perit, at a glacial pace.

a bit, bar bit, bit, bit field, bit part, blade bit, bore bit, brace and bit, canon bit, center bit, centre bit, chamfer bit, check bit, core bit, countersink bit, cross bit, curb bit, drill bit, drilling bit, every bit, expansion bit, expansive bit, fippenny bit, fishtail bit, not a bit, parity bit, pilot bit, rock bit, roller bit, snaffle bit, spade bit, the least bit, twist bit