The term 'instants' refers to a very short period of time. The crossword solutions for this term include CASE (4 letters), JIFFS (5 letters), MOMENTS (7 letters), SECS (4 letters), TRICES (6 letters), and SPLITSECONDS (12 letters). CASE is an abbreviation for 'CIRCUMSTANCES, ' JIFFS is a slang term for 'SECONDS, ' MOMENTS is a synonym for 'instants, ' SECS is an abbreviation for 'SECONDS, ' TRICES is a slang term for 'moments, ' and SPLITSECONDS is a combination of two words meaning 'very short periods of time.'