Answer: onceinalifetime

AnswerCrossword Clue
ONCEINALIFETIMESeldom, and then some
ONCEINALIFETIMELike opportunities that might be hard to decline
ONCEINALIFETIMETalking Heads' "As the days go by, let the water hold me down" song
ONCEINALIFETIMEVery rarely indeed
ONCEINALIFETIMEExtremely rare
ONCEINALIFETIMELike certain opportunities
ONCEINALIFETIMEBricusse-Newley song: 1961
ONCEINALIFETIMERarely
ONCEINALIFETIMEVery unusual
ONCEINALIFETIMEHardly ever
ONCEINALIFETIMEKaufman-Hart play: 1930
ONCEINALIFETIMESlightly more than never
ONCEINALIFETIMEVery rare
ONCEINALIFETIMENever? Well, almost
ONCEINALIFETIMEKaufman-Hart play
ONCEINALIFETIMEPlay about Hollywood
ONCEINALIFETIMEInfrequently
ONCEINALIFETIMERare
ONCEINALIFETIMEDesignating a unique event.
ONCEINALIFETIMEKaufman-Hart play.
ONCEINALIFETIMEHit play of 1930.
ONCEINALIFETIMEUltrarare
ONCEINALIFETIMEType of opportunity