What maximum number of type THHN, size 14 AWG insulated alarm circuit conductors is allowed in 3/8″ flexible metal conduit with fittings inside the conduit?{disregard any grounding conductors}

What maximum number of type THHN, size 14 AWG insulated alarm circuit conductors is allowed in 3/8″ flexible metal conduit with fittings inside the conduit?{disregard any grounding conductors}