About selecting specific nodes with specific value

Hi all,
I am trying to list nodes with grafana query that would show only nodes witch has only 2 cpus.
Not to show nodes that have, for example more than 3 CPUS.
Can I add some condition to query?
This is current one that I have.
count(node_cpu_seconds_total{origin_prometheus=~“$origin_prometheus”,job=~“$job”,mode=‘system’}) by (instance)