__ in a while; occasionally
I believe the answer is:
once
(Other definitions for once that I've seen before include "One-time musical film and song" , "Formerly; as soon as" , "Quick examination" , "In former times" , "Long ago" .)
I believe the answer is:
once
(Other definitions for once that I've seen before include "One-time musical film and song" , "Formerly; as soon as" , "Quick examination" , "In former times" , "Long ago" .)