Rsync from remote machine via ssh and sync by uisng find by modified time

Hi

I have a requirement to rsync from remote to local machine via ssh and sync files that are changed in last n hours.
pgrep to check if no other sync is running

pgrep -f rsync.*/opt > /dev/null || rsync --bwlimit=10000 -avz --delete root@X.X.X.X:/var/source/ /opt/dest/   >> /home/log 2>&1

Due to limitations on destination machine sync job needs to be run on local machine

Please can some one help me with this

Thanks in advance