In vedic astrology dasa bhukti antara is very important to
predict the timing of events.
dasa chidram means a particular dasa ends an last bhukti /antara
of the dasa starts then it said to be dasa chidram .
say an example in jupiter dasa last bhukti will be rahu bhukti
mars antaram is said to be dasa chidram. you will not expecting
much bigger changes in that period.