  The Galactic black hole candidate (BHC) 4U~1630-472 has gone through several
outbursts (13 to be particular) in the last two and a half decades starting
from the RXTE era till date. Like the outbursts of other transient BHCs, the
outbursts of this source show variations in duration, peak numbers, highest
peak flux, etc. However, unlike any other soft X-ray transients, this source
showed outbursts of two types, such as normal and super. The normal outbursts
of duration $\sim 100-200$~days are observed quasi periodically at an average
recurrence/quiescence period of $\sim 500$~days. The super outbursts of
duration $\sim 1.5-2.5$~years contain one or more normal outbursts other than
one mega outburst. We make an effort to separate flux contribution of the
normal and the mega outbursts from the super outbursts, and tried to understand
the nature of evolution of both types (normal and mega) of outbursts, based on
the quiescent period prior to the outbursts. Archival data of RXTE/ASM from
January 1996 to June 2011, and MAXI/GSC from August 2009 to July 2020 are used
for our study. A possible linear relation between the quiescent and
outburstsing periods for both types of outbursts are observed. This makes the
BHC a special source, and it may contain two companion binaries. Two companions
might be responsible for two types of outbursts.
