Iptables: Expiring Ip Block

I'm trying to figure out an iptables rule to block certain ips for a limited duration, after which the block rule will be removed.

hits to the iptables filter while the ip is blocked should not renew the timer.

i got as far as:

iptables -A INPUT -m recent --name blacklist --rcheck --seconds 10 -j REJECT
iptables -A INPUT -m recent --name blacklist --remove

but how do i blacklist an ip now ? (this needs to be done via external app and not via iptables matches/hitcounts)
iptables -A INPUT -s xxx.xxx.xxx.xxx -m recent --name blacklist --set
would renew the blacklist every time that ip sends a packet no matter if it is blocked or not. and also that rule would remain in iptables even when expired