Running $ echo min-cache-ttl=300 | \ sudo tee /etc/dnsmasq.d/99-min-cache-ttl.conf will likely cut down on the number of forwarded queries by a large

Running $ echo min-cache-ttl=300 | \ sudo tee /etc/dnsmasq.d/99-min-cache-ttl.conf will likely cut down on the number of forwarded queries by a large amount. Adjust the value (in seconds) to your needs. Don't forget to run $ sudo pihole restartdns afterwards.