gradual
adrift
apart
apart from
aside from
asunder
away from
bit by bit
by degrees
by inches
by inchmeal
by snatches
disjointed
drop by drop
fitfully
foot by foot
fragment
fragmentary
gradually
in detail
in driblets
in installments
in lots
in small doses
in snatches
in the abstract
in twain
in two
inch by inch
inchmeal
intermittently
limbmeal
little by little
one by one
part by part
piece by piece
scrap
separate
separately
severally
single
slowly
sporadic
sporadically
step-by-step