古往今来[kooukonrai] in all ages
古今[kokon] ancient and modern times
古今東西[kokontouzai] all times and places
古今無類[kokonmurui] best ever

今か今か[imakaimaka] eagerly waiting
今が今[imagaima] just now
今が今まで[imagaimamade] till just now
今しがた[imashigata] moment ago

一朝一夕[icchouisseki] in a day
一朝一夕に[icchouissekini] in a day
一夕[isseki] one evening
一夕話[issekiwa] (a) short story

朝夕[asayuu] morning and evening
夕間暮れ[yuumagure] evening twilight
夕闇[yuuyami] dusk
夕映え[yuubae] sunset glow