Single occasion (4)
I believe the answer is:
once
(Other definitions for once that I've seen before include "'... bitten, twice shy'" , "At some time past" , "Singly" , "... upon a time for the storyteller" , "not repeatedly" .)
I believe the answer is:
once
(Other definitions for once that I've seen before include "'... bitten, twice shy'" , "At some time past" , "Singly" , "... upon a time for the storyteller" , "not repeatedly" .)