s4 notary node stats from Decker's kindly provided data directly from KMD daemon
git clone https://github.com/webworker01/nns4stats.git
cd nns4stats
wget https://download.kmd.sh/s4-stats-txes-time.tar.gz
tar -xzvf s4-stats-txes-time.tar.gz
python3 nns4stats.py