by the by
• incidentally.
• "where's Hector, by the by?"
by and by
• before long; eventually.
Similar:
eventually,
ultimately,
finally,
in the end,
as time goes on/by,
one day,
some day,
sooner or later,
in time,
in a while,
after a bit,
in the long run,
in the fullness of time,
at a later time,
at a later date,
at length,
at a future time/date,
at some point in the future,
in the future,
in time to come,
in due course,
